Category: Environment

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Marc Aurel Book 8-9

In book 7 paragraph 38 the stoic wisdom is exemplified in the the the short phrase „If you have sharp sight, use it: but, as the poet says, add wise judgment“. Being sharp in your reasoning or data collection is only part of the human endeavor. A wise judgement is, however, an ambitious aim as judgments have different short term and long term consequences. Intergenerational considerations as for climate change ask for respect of other species, biodiversity and to take into account very long time horizons.  The quote from book 8 paragraph 5 appears very modern or post-modern in this context. „There can often be wrongs of omission as well as commission.“ (both citations from Penguin Classics edition) Not acting on behalf of future generations and disappearing species is the most crying omission of our time.

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Fontainebleau garden

The garden of Fontainebleau is huge. The design by “Le Notre” is splendid in its combination of trees, greens and water reserves. Beyond walking in the park you may enjoy a horse ride ora  tour in a carriage, some even today. Boating is an additional amenity rarely available at other castles. In the Belvedere in the middle of the water basin romantic or secretive diplomatic conversations might take place. Politics and diplomacy have always needed special locations to prepare decisions. This is a historical constant. 

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Timeless Nature

The beauty of butterflies has fascinated thousands of generations. It is the boomers’ generation that has increased the risks that future generations will have difficulties to enjoy the simple beauty of nature in their gardens or parks. Preservation of biodiversity is a value that should be ranked much higher than previously. Monitoring of biodiversity needs a generation of people well aware what a rich ecosystem and biodiversity looks like and how to preserve or restore it. Much to do for teaching and learning professionals as well. Curriculum development for biodiversity and sustainability is in urgent need for updates. This has to include the socioeconomic dimension as well.

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Air pollution dementia

A comprehensive review and update of evidence that indicates a link between air pollution and dementia has been published in “The Lancet” open access on 2025-7-25. Besides a genetic predisposition the environmental impact of our worsening air quality caused by fine dust particles and PM 2,5 and nitrogen dioxide NO2 has been found in several studies. This updated meta study should be an additional warning to take efforts to clean up our air more seriously. The diesel engines amongst other sources of air pollution have contributed a great deal to this evolution. Inner city inhabitants are at greater risks to suffer the consequences as they are more exposed to these pollutants and for longer durations. Clean air is a matter of brain health in advanced age and biodiversity as well.  

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Just walk

The benefits of walking for several health outcomes is well known. The evidence is in favor of 7000 steps per day as a reasonable baseline. Some outcomes improve further if we walk even more steps, but not all. Probably, the effects of being accompanied while walking will enhance outcomes as well. Every summer the step threshold may be pushed a little bit further. Goal setting can help along to overcome eventual barriers to leave the home later in the evening. Nature rewards us with changing daylight and seasonal changes. We just have to get started to reap those health benefits.

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Climate Awareness

The Musée d’Orsay has prepared a wonderful walk through its permanent exhibition of late 19th and early 20th century installations to reflect upon climate and climate change. Raising awareness about the treasures lost and those we are about to lose in the next few years. Impressionist painters have depicted landscapes, cities and monuments covered in snow, which the next generations will no longer be able to enjoy the same way. The roofs of Paris covered with snow has become a feature of a distant past. Additionally, the impression of the massive steam trains crossing metal bridges appear as the daunting future of technical progress. Mixed feelings of fascination and risk associated with those machines were captured by those painters’ eyes. Nowadays we are aware of the consequences of this technical progress for our planet. The walk through museum with a focus on climate related paintings is eye opening indeed. (Image: Extract of Éduard Veuillard, Le jardin des Tuileries, Musée d’Orsay, Paris) 

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Less but better

There are many examples where a new mantra for the 21st century emerges from recent scientific evidence: “Less, but better” (Lbb). In studies of nutrition and human dietary requirements, the importance to eat less has been demonstrated on a regular basis. And this is even more important than to do more exercise if weight loss is the target or the attempt to explain obesity across the globe (McGrosky et al. 2025). The case for eating less is strong. Eating better refers to the need to avoid unhealthy, toxic or cancerous food or the way to prepare food. “Less but better” could become the new mantra or “categorical imperative” if you like it more philosophical in tone. We, the people gain, and the planet will gain as well. It is an easy win-win case, albeit with some behavioral implications.

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All electric now

The shift over to the “All electric society” is easiest in sunny states like California in the USA, Africa or Southern Europe. For other regions of the globe not only the production of energy through the sun is a bit less abundant, but the storage of the sun’s energy production for deferred use is the next challenge. Countries of the globe near the equator have to balance 12 hours daylight with 12 hours night, countries far from the equator have to balance additionally more long-term between short winter days and long summer light.
Different energy storage solutions have to be envisaged.
On a daily basis or even weekly basis, battery energy storage systems (BESS) can do the trick. These systems become more costly for high capacity, longer duration storage. Battery size and price quickly become an issue. The number of electric vehicles (EVs) that have this more intelligent BESS is rising. This makes it possible to eventually use this storage capacity, if your car is sitting around your home or office for most of the time anyway. To make the “all electric society” function 24 hours, energy storage has to be planned at the same time as production and consumption patterns. The all electric prosumer will be the de-central “pro-store-sumer” in the 21st century.

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Green trade flows

The statistics on trade flows reported by the UN Department of Economic and Social Affairs have a comprehensive data base in the background. The descriptive inspection of the raw data on trade flows comprising solar panels, batteries and electric vehicles shows a stark imbalance of how future-proof the trade between countries is. The New York Times (David Gelles et al. 2025-6-30) has put this information into an impressive graphical design to show the magnitude of the imbalance of how China trades in green products with the world and how the USA is losing out on future-proof low carbon emission trade. Despite the fact that China is still heavily emitting CO2 today due to burning coal for electrical power, the investments at home and trade with the world is moving into the opposite direction. We have seen many of these industries at risk in Europe, like solar panel production, batteries and increasingly electric vehicles, without the western countries getting organized to address crucial business and economic challenges. Falling behind in these industries and trade will shift global balances in the near future. Renovation through innovation is more promising than holding on for another decade to inefficient and more polluting energy sources. Repairs of homes and buildings have long lasting effects, which we can, nevertheless, change today.

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Pervasive waste

From time to time waste from so-called highly developed countries is making headlines and then it is forgotten again. Huge amounts of plastic waste gets shipped for example from the USA to Malaysia in containers regularly (NYT 2025-7-1). The dumping of waste in other countries where it is cheaper to waste the waste is a cynical practice. Not only is the potential for reuse and a circular economy disregard, the little control that is exercised how the waste is treated afterwards is neglected. Some might just end up in our oceans later on or find its way in our food chains. The recent discovery of lots of nuclear waste at 5000 m depth in the sea in another extreme example of this practice to dump waste affecting all of is when profits have been accumulated inn the hands of a few enterprises and states. Such external effects as they are called in economic theory are part of the standard economic thinking. The challenge is to detect such behavior, persecute or better prevent it. This calls on countries who produce the waste to check for the contamination potential and treat their own waste. Fukushima has lots of barrels of nuclear waste waiting. The pervasive nature of this waste will make it last for thousands of years. “Beggar thy neighbor” with your waste is a major default of our current economic and social model. It remains an unresolved puzzle why mankind continues to work towards its own extinction. (Image: Le grisou, Constantin Meunier, MRBAB, Brussels). 

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Home cooling 2

As a consequence of global warming architecture has to cater for the cooling of our homes as well. The 1st option is to keep the heat outside. Isolation is key in this respect as well. Colors outside have a long tradition in protecting against heating up due to abundant sunshine. Doors and windows ask for additional protection as well. Historically, trees have been instrumental in providing shade for homes. Greening of facades is another natural option. For a long time homeshomes have been built above an underground floor or a cellar. Originally these naturally cool rooms served as storage rooms for food and drinks. Nowadays, such basements offer additional cool space during (exceptionally) hot summer days. The distribution of cool air from basements to upper floors is an alternative way of cooling, which uses little energy. For newly built homes this is another reason to drill builders drill. Even office space has been built in this way, much appreciated during the warm seasons. (Image: Paris UNESCO headquarters office space). 

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Home Energy

Energy production and consumption in a home are determined by many factors. The number of persons in a household has, of course, a considerable impact on consumption patterns. The investment in home energy production can cover the basics, but is less likely to cover peaks of consumption like friends on a visit wanting to charge their electric vehicle.
In a test with a simple small scale solar panel (fixed on a balcony for example with 860W peak) it was possible to produce a full days consumption on a sunny summer day for a 1-2 person household without use of electricity for personal mobility, but hot water through heat pump provision. The potential for an own production of electricity during summer months is within reach without major behavioral changes.
Okay, digital steering of energy consumption for hot water during hours of bright sunshine and washing machine around high noon are not for everybody to program or carry through.
Digital tools complement the energy consumption at the right time. There is a lot of power in sunshine. The usual caveats of bad weather and winter months change the calculations. The return on investment or break even point needs 300 days of about 2 kWh to recover the 500€ initial costs of the solar panels. After about 3 years the initial costs are recovered and savings begin to accrue. The bridge between energy theory and practical applications is to be found in experimental setups and tests of different scenarios for the modern “prosumer” of the 21st century.

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Energetic Architecture

The link between energy and architecture is all to obvious. For at least a century we believed that energy had to serve architecture and could be relegated to second place. With global warming the overriding importance sits with energy concerns for some years to come. We spend billions to repair the bad architectural and fast growth architecture of the post 2WW era of architecture, especially the construction boom of the 60s and 70s. The driver of change in architecture has moved from the period of social architecture (60s, 70s) to energetic architecture. Energy in architecture has multiple dimensions. Whereas a century ago the shift consisted in the installation of central heating systems in the northern hemisphere of the globe at scale, in the 21st century the concern there shifts to isolation from heat (and cold) to more efficient, less polluting energy provision. Cooling houses and office spaces during extended periods and higher peeks of heat, ask for substantial revisions of existent architecture and the next generation of energetic architecture. Before long, we shall also think more seriously about the handling of water in architecture, a topic which is closely linked to energy consumption and design.
From a sociological point of view we are used to ask questions of social inequality related to this issue as well. We are on the way to move into a society of energy-rich versus energy poor households and enterprises. Financing of adaptations of housing and offices to the energetic challenges is likely to create severe additional inequalities, which exacerbate the already existing ones. If you have no money to spare, you will be unable to invest into energy savings with more distant returns on investment (ROI). At older age you are less resistant to heat waves and causes health disadvantages. If previous investments were impossible or the urgency for energetic architecture was neglected for too long, additional health inequalities shall arise.
The “Deutsches Architekturmuseum” has built an exhibition around this theme, which widens the perspective of architecture and energy. This highlights the additional concern for energetic architecture and people living or working in (modern) architecture.
(Image Trier Roman arena 2025)

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Global warming

The annual update of the global warming indicators (source: Earth system science data 2025-6) gives more reasons to worry about the future of our climate. The objective to limit global warming to +1.5°C, established at the Paris climate agreement in 2015, is no longer achievable. This is the hard evidence based on the global network of scientific data collections and their projections. Fossil fuels are a major cause, deforestation and greenhouse gas emissions as well (Forster et al. 2025). As a consequence, human-induced warming of average surface temperatures and flows of heat into oceans continue. The first consequences, we witness in many parts of the world already. France is particularly affected (Le Monde 2025-6-20, p.7). What used to be called “natural disasters” is better described as long-term consequences of human-induced global changes like global warming. About time to take our CO2 footprint even more seriously. The “All electric society” can reduce reliance on fossil fuels considerably, as of now.

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Fertility Fecundity

The scientific debate around changes in fertility has focused on social, economic and cultural factors to explain the drop in total fertility rates in OECD countries. The baby boom years of the 1950s and early 1960s had come to an end following the spread of new forms of birth control like contraception from the late 1960s onwards. The trend is very obvious and yet, the explanations of the trend might lack a more profound analysis of fecundity in addition to the socio-economic explanations. Shakkebaek et al. (2025) point for example to the little known effects of environmental (pollution) factors on the biological reproduction capability of humans (men and women).
Additionally, psycho-social factors like “the German Angst” fear about future developments in many social and economic fields might have direct effects, but also indirect effects on human biology. We know still very little about such feedback loops or feedback effects. We are more convinced, than we actually have hard evidence, that the BSP, SPB or PSB (B=Bio, S=Social, P=Psycho) spheres are interwoven, but an ambitious research agenda is called for to enlighten the issue. The big invisible elephant in the room might be environmental issues that enter into the fertility equations more than we have expected for many years. A nice working hypothesis for an ambitious and overdue research agenda.

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Home cooling

In the summer months, in Europe, the concern shifts from heating your home to cooling your home. For generations this has been possible without use of air conditioning. A natural way of cooling has been for centuries to dig into earth to take advantage of the rather stable and cool temperatures underground. In home building this has also been a tradition for centuries to build cellars underneath a home.
Wine growing regions have used the cellar as a natural cooling facility for long and short term storage of wine. Digging into a mountain of a valley offered a natural cool storage solution for years without additional energy consumption. Modern buildings should return to this practice and gain cold from below the surface to cool buildings in the warm or hot seasons. Good isolation combined with the cool temperatures from below the surface in summer months will substantially save energy and thereby CO2 emissions. Circulation of the cool air from below to the upper floors is the issue as well as dealing with differential humidity levels. The wisdom of previous generations in home building with no access to air conditioning (avoiding the air conditioning paradox) is likely to experience a revival in the coming years.
Coolness is the new and old wisdom.

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Warming continues

The global warming continues to change our landscapes. Heat waves, droughts and flooding become more often. Average temperatures keep rising. The evidence from meteorological data is showing this beyond doubt. Our forest take the toll and reports document the worsening situation for many trees (Germany and Switzerland). An adaptation will take years if not decades. In the region around Paris some home owners have started or been forced to adapt their gardens to the warming weather conditions. Trees that do not support the consequences of warming die and we witness the changing of the landscape. Palm trees near Paris have survive for years by now near Paris and can grow rather tall.
Like it or not, the visual landscape will change despite the many great initiatives launched by the city of Paris to stop the warming of the city.

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Rainwater Use

The use of rainwater is fairly easy to realize. Most homes in Europe and beyond have a roof drainage system in place. However, for decades the only concern was to get rid of the water as soon as possible. Nowadays, we think twice about it. The recovery and storage of rainwater for a separate use in a household has become a substantial cost saving exercise. In the Paris region in France you can expect on average 650 liters of rainwater per year per square meter. For a roof size of, for example, 70 m2 this yields about 45.000 liters per year. If you take a shower using 40 liters this allows you and your household to take 1125 showers or 3 persons almost one shower every day. Average household consumption in Paris is 120L/day, which adds up to about 44.000 liters per year for washing and toilet use. On a monthly basis with a storage capacity of 4000 liters of rainwater per adult person you should be able to manage your own consumption with your own roof drainage system. It is a rather simple use case. Maybe during dry summer months the calculation is a bit too optimistic, but the potential for a water autonomy of households in Europe is an option. In addition to the dry January, the no mow May, we shall have the no shower July next. 

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Smart Heat Pumps

The potential to reduce CO2 emissions through the replacement of fossil fuels with heat pumps is huge. The technology is well known and has reached a considerable amount of maturity in the mid 2020s. Noise is much less an issue even at higher compression rates and during the use of booster functions to cater for peaks of hot water or home heating. Combined with solar energy the local production and consumption of energy turn each household into a “prosumer” of energy. Besides the initial investment you have to find capable technicians and enterprises that master the installation of the technology with the necessary care and ensure the adequate calculation of the envisaged energy needs of the household. Household and family size matter, and this is not easy to project into the future. Additional saving potentials can be harvested through the use of smart home applications. Switch off the heating before you leave or if a longer than previewed absence occurs. Just do it if you are away from home. Alternatively, just start the heating when you get on your way back home from work rather than at previously estimated, but fixed times. Smart technology is just perfect for such use cases.

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Citizen Walk

Capitals like Paris and Berlin make great efforts to improve the walkability of their cities. After decades of focus on automotive traffic and mobility and the detrimental effects on health for several generations of people, the awareness that walking citizens are part of the solution is spreading. Citizens of Paris voted in a referendum to stop circulation of cars in 500 more streets. In Berlin pedestrians unite to mobilize more people to take to the streets as well and reclaim walking space. In high density spaces like metropolitan areas it is possible to reach all major amenities within a reasonable walking distance. The more spread out suburban area, however, leve fewer options to walk and carry your shopping or do your dily commute to work while walking. Fewer cars and pharmaceutical products sold would mean less „artificial economic growth, but more healthy and happy citizens. It will take decades again to realize such visions.

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Paris Gare

Train stations in metropolitan inner cities are hot spots of traffic and mobility. The number of people passing through these exchanges are impressive. Public transport systems are continuously put to the test of their capacity to handle passengers who want to get from A to B the fastest way possible. In Paris the RER lines, metro and buses to a great job in handling the affluence of passengers. The comparatively small number of passengers arriving and departing nyy taxi, however, still take a disproportionate amount of space. That’s part of the differentiation or inequality of mobility in Paris. Person‘s in need of assistance should have special access to central points of mobility like train stations. Everybody else could rely on shared modes of transportation otherwise the millions of inhabitants will not be able to get around in a comfortable way.

 

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Robot repairs

Robots have been used mostly in industry for assembling, transport or sorting tasks. There is also a role in disassembling to enhance circularity. To repair electric or mechanic devices there is an enhanced version needed which starts with a diagnosis of the problem. Algorithms can sort out promising from dead end routes of repairs. However, the recognition of objects into things that can be repaired and those without repair potential is a worthwhile assistance. Beyond the economic and ecological rationale for repairs, there is an emotional or nostalgic sense to it as well. Maybe, from a life course perspective any object related to the teenager years of a person qualify for nostalgic value. Even simple robots or AI-assisted objects may qualify for this in future. Artificial friends will be like tamagotchis in need of repairs.

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Repairs again

Trying to repair electric or mechanic devices is confronted with multiple obstacles. Spare parts are hard to come by and many pieces needed are no longer in stock. Hence, in many instances the remaining option is to use recovery pieces from other broken or discarded devices. Whereas this is still common for repairs of vintage cars, for example, this is rather rare for consumer electronics like stereo music players or television sets. An aging clientele of the repair market is very used to a specific device and is often reluctant to change habits. 

An additional element in the repair process is access. Only in thinking repairs into the engineering and design of the device will make repairs feasible later on. An economy and business model which is based upon a high turnover as the basis for profitability has no interest in engineering for repairs later on. This makes a preservation of resources tricky. Disassembling is a necessary but not sufficient condition for the repair sector to thrive. At least the basic materials enter into a circular economy as a first step. Further steps consist in preserving the skills needed to disassemble and/or repair more. The habit „buy a new one and throw away the old one“ is hard ro change. 

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Permanently anxious

„There’s a set of forces that want us to be permanently anxious“, is the phrase chosen by Tony Cokes in the exhibit just outside the „Palais Populaire“ in Berlin in 2025-5. International politics and the economic upheaval caused by Trump’s tariffs contribute to the already existing other sources of anxiety like nuclear energy and warfare. Global warming causing more extreme weather events add more man-made reasons for anxiety. The next generations will have to foot the bills we have left to them unpaid. Our current shortsightedness increases anxieties which previous generations have not known of a similar kind or in that combination. 

Community building and solidarity are ways to overcome such overwhelming anxieties. Supranational organizations like the European Union have an even stronger role to play to reassure its people with credible signs of solidarity. We are not alone in the struggle to overcome the anxiety that is creeping up around us. We are certainly stronger together than individually dealing with unspecified fears. „We shall overcome …“

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Archi health

The links between architecture and human health are manifold. There are direct effects of healthy versus unhealthy materials in construction. For the purpose of making buildings fire proof or more resistant to heat asbestos had been used for decades which still causes health hazards nowadays in the removal of this cancerous material. Paint has to be chosen wisely as well as isolation materials. Indirect or second round effects of materials have to be considered additionally. Cement in construction uses a lot of energy in its production and has only been recycled since a few years in significant amounts. Room climate or even psychological effects of architecture have been considered to be important more seriously in recent years. A new discipline entitled “neuro-architecture” may be developed soon. Schools, sports facilities, hospitals or community centers benefit from healthy architecture. Cost benefit analyses which take into account long term effects and even recycling of materials shift the balance much in favor of health considerations also in architecture. “Fast and dirty” will be much more expensive than “slow and healthy”. Future generations will be thankful. (Image: Spreewald Primary school Berlin).

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Dysprosium 66

Dysprosium figures as Nr. 66 in the periodic table (short: Dy). This metal was given this Greek name, which translates to “hard to get”. Although more common than gold on earth, Dysprosium is part of the so-called rare earths on earth. Since it is very temperature resistant before becoming fluid and at the same time having good isolation properties, for example against radiation in combination with lead, the nuclear energy industry has a definite use case.
Additionally, wind turbines, electric vehicles and some smart phones use these characteristics of the metal only known to us since the late 19th century.
The major exploitation happens in China and, therefore, the recent tariffs have complicated the trading. Prices tend to rise and products that contain Dysprosium are likely to become more expensive. However, there is the other side of the coin, which means recycling and reuse of Dysprosium is also more interesting to companies. Hence, the price increase will likely enhance circularity of the metal from obsolete products into newer ones. In this respect it is good news that smartphones receive longer updates of their operating systems and security as of 2025-6-20 in the EU. This will also reduce the amount of rare earths needed in the production of the rapidly changing technical specifications of smart phones and tablets. Repairing the devices makes more economic sense before “programmed” obsolescence.
(Image: extract from Willem van der Vliet (attributed), The money counter. early 17th century, Brussels MRBAB).

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Spring Newborn

For many species spring is the time for newborns to enter into life. Pigeons in the neighborhood have completed the breeding phase and they called upon the newborn to crack the shell open. Nourishment is already abundant in the surroundings and parents appear to be impatient to quit the guarding of their offsprings. Time for the next generation to take over a similar role soon.
Pigeons don’t ask questions about fertility. They reproduce in abundance if the environmental conditions are alright.
Human beings are a danger for them as some feed them well, but others defend their territory, housing or living space against any intrusion by pigeons. Compromises are not easy to accomplish.
Fans of the song writer Georg Kreissler keep humming with dark humor: „Geh‘n wir Tauben vergiften im Park …“. The struggle for survival of species has changed in kind and we are, more than ever, responsible for the living conditions of other species as well.

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Own Production

The 21st century has seen many innovations. Solar energy has been around for at least 3 decades now, but the wide spread application and adoption of it through consumers has taken quite a while. Nowadays you can buy a reasonably priced solar panel in your local shop selling gardening tools and home appliances. Solar panels have moved from a niche product to become an ordinary home enhancement product. Previously, the production of energy was highly regulated and restricted to business activities. Hence as producer and consumer of your own energy you became a “prosumer” of energy. Just refrain from selling the energy to your neighbors and you will be happy monitoring your own energy production and your energy consumption throughout the day as well. Suddenly, you might make a few behavioral adjustments to your daily routine. Throughout the day when the sun is shining bright you start to think of what kind of energy consumption you might want to switch on at the time. Charging mobile phones, cooking meals and washing are the obvious candidates that do the trick. Charging a battery of a bicycle(s) is also a good idea. The excursion of the evening or cycling to work the next few days is feasible with this as well. There is a slight danger to check the energy production frequently to optimize the return on your investment. In this case it might be expedient to invest also in a battery to store the energy  for a longer time. No stress for consuming your nuggets, but initial investment costs are substantially higher, albeit prices for batteries have come down significantly in the last few months. “Prosit prosumers”.

 

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Sun power

Statistics of hours of sunshine in Germany and many European countries show an extraordinary amount of sunny days in March 2025 compared to previous years. This opens up a window of opportunity to produce electricity already in a month previously less likely to yield a lot of energy. With more likely 8 months of decent electricity production the efficiency of investments in solar energy reach break even points earlier. Time to think of expanding the share of renewable energy even further. The cost effectiveness is improving in rather unpredictable ways. Economists, of course, consider opportunity costs in this case the alternative to use oil or gas despite the higher levels of CO2 emissions. As the prices are currently lower as well, without an easily predictable trend, solar alternatives are a valid option.

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Warming consequences

The live of honey bees is rather busy and well organized. Global warming necessitates new risks and new opportunities for honey bees. The flowering season starts earlier in Europe and bees start earlier ro their collection of nectar and their service of pollination to other flowers. In early April 2025 in France near Paris we observe wild bees already in their daily routine. However, the risk of cold nights is still there, albeit those building their homes below the surface are a bit less at risk during a frosty night. Seeking a clever shelter is a good strategy for survival particularly at times of global warming. Some kinds of wild bees seem to sense this already changing homes from one season to next one. Humans remain their toughest enemies as they restrict their choices quite severely. Man-made pollution and herbicides are beyond bees’ control and cause havoc in the ecosystem of bees. Apiculture is an interesting science also for social scientists as this forerunner species of the matriarchy has evolved into a well-organized productive society. They are a bit harsh to each other and communication is rather unidirectional, but an interesting social cosmos of its own kind.