Marc Aurel Philosopher

2025-9 marks an additional landmark in the achievements of the late Marc Aurel. In the Roman built city of Trier, 3 museums offer exhibitions on the life, ideas and imperial governance style of Marc Aurel. Libraries and bookshops around the city portray a wealth of books and studies by and about Marc Aurel as well in many languages (image below 2025-9). The stoic author and practitioner has served as an example of a leadership style which became for many subsequent leaders a hard-to-achieve precedent. The writing style of Marc Aurel in short paragraphs and aphorisms proved highly accessible, although his readership swell only after a Latin translation of his Greek original appeared in the 16th century. The title “Meditations” in English, “Pensées pou moi-même” in French or “Selbstbetrachtungen” in German demonstrate the difficulty to get to grips with the author’s intention and objectives in writing down these reflections on life, ethics, humanity and good governance. Through the use of Greek rather than Latin he puts himself in the line of Greek philosophers rather than the succession of Roman emperors. As the numbers of bad leaders still outnumber the good governance style advocated by Marc Aurel, these exhibitions in the Simeonstift, the Landesmuseum and the Stadtbibliothek are a perfect opportunity to demonstrate that good governance is something that can be studied and learned even in the distant Roman history.  

Vacation or Workation

Vacation or Workation, that is the question. Remote work and outsourcing of work have  created the opportunity for more people to work from distant places. Logging into the firm’s or the administration’s secured intranet enabled to work from where you prefer to work rather than on the premises of the firm. After the technological shift to enable secure remote work, the acceptability of remote work is a societal issue. Whereas bosses worked or had to work while on travel for many decades, the same has become feasible due to reduced costs for many other employees as well. The Covid-19 pandemic has forced another shift in the need to accept and advance remote work as well. Taken together the option of a “workation” instead of a vacation became equally more feasible. The borderline between remote work, “workation” and vacation has become more and more blurred. It remains to be seen, whether these options enhance an outsourcing trend by firms or whether  more “back-sourcing” or “in-sourcing” will be the consequence.
Employers with their associations and employees with their trade union representatives have a need to include such topics in their bargaining agenda in addition to pay, health and safety, as well as working time adaptations.
(Image created with Canva 2025-9)

 

Paris Sorbonne

The history of the university on the left bank of “La Seine” dates back to 1257 when Robert de Sorbon an advisor to Louis IX was asked to create a unifying structure of several colleges which provided room and board already. The location on the left bank in Paris allowed these colleges to escape the religious doctrines and archbishop who dominated the right bank. The choice of the name of the advisor rather than the King was already showing early signs of independence which was cherished by generations of students and professors. The Colleges had individual names like “Collège des Bernardins” or “Collège de Navarre” and operated under the title of “La Sobonne”. The “Musée Histoire de Paris Carnavalet” shows an early design of the Collège de Navarre. Independent thinkers and writers were formed there who became very influential later on in their careers. Thomas d’Aquin was one of them.

liberté urbanité

In the museum of the history of Paris “Musée Histoire de Paris Carnavalet” we find a special place devoted to the commemoration of the terror attacks in Paris in the Bataclan event location and the office of the journal “Charlie Hebdo” (see image below”. The skateboard on the bottom left of the wall raises the value of “urbanité” next to liberté, égalité, fraternité. The attack of an urban living style with youth going out as they like and journalists and caricaturists speaking their minds freely had been attacked, but continues nevertheless. This statement is part of the Paris state of mind. 

Home for dog

The places where some dogs live can be rather big. But even tiny dogs may enjoy a luxury home like their owners. This was certainly the case for the dog’s niche in a Paris home, a few years before the French revolution (1785). The exhibit is a testimony of the tough inequality of the late 18th century in Paris, where some enjoyed far reaching luxury and large parts of the population were forced to live in poverty within Paris or the suburbs with little access to basic sanitary facilities. The discrepancy between the luxurious homes of pets and the average person might serve as an indicator for income and health inequality. The Musée Histoire de Paris Carnavalet has a great stock of artifacts that can speak to the issue. Image: Musée Histoire de Paris Carnavalet dog niche 1785). 

Emotional history

The making of emotional memories of a city is an art in itself. Many cities have professional photographers who accompany all major events in a city over years. Paris has had the chance that artist photographers and film makers have contributed greatly to the emotional history of the city. Agnès Varda was such a formidable person whose images and movies moved people and allowed to share emotions about the city’s busy and diverse neighborhoods. The « Musée Histoire de Paris Carnavalet » combines an autobiographic perspective with the emotional depiction of live in Paris from the 1950s onwards into the late 20th century. (Image: Agnès Varda, 1950 self-portrait, MEP Paris). 

Femmes Photographers

Paris puts 2 women photographer into the spotlight. The MEP and the Musée historique de la Ville de Paris feature a gender perspective on photography. Both photographers have a common starting point in black and white photography.  Each moved on to develop their art into an additional direction later during their career. Marie-Laure de Decker shifted from the early camera technology from black and white images to color photography in the later stages of her career. Agnès Varda moved from her initial b/w photographic work on to the production of videos for cinema, mainly focused on life in Paris from the early 1960s onwards. An evolution over the professional life becomes evident for both through these retrospectives of their respective work. Technologies evolved and became more accessible for artists’ creative expression. Both moved on to adopt new techniques and challenges. Great personal learning experiences and models for today’s challenges.

(Image Marie-Laure de Decker, L’image comme engagement 2025-8 MEP Paris).

Gentileschi Iconologia

Ever since the publication of Cesare Ripa’s „Iconologia“ (1593) the codes of art had become subject of a coded production and interpretation of art. Attributes of power or wealth like palms, scepters or crowns, decorated with gold and diamonds spoke a language easily understood by onlookers irrespective of time periods. Orazio and his daughter Artemisia applied this Iconologia throughout their work. The apparently simple depiction of bad weather became a sign of trouble ahead in a person‘s life, office or reign. From the success of Caravaggio‘s paintings, the application of light and shadow became another stylistic feature of especially Artemisia‘s work. Whereas the application of these techniques is a sign of craftsmanship, the own contributions like a more emotional and emancipatory repertoire of Artemisia make her an artist of her own kind. (Image Artemisia Gentileschi, Madelaine pénitante 1625, Musée Jacquemart André“ in Paris 2025-8) 

Women artists

The history of art has been dominated in public opinion for centuries by men. However, recently art historians have drawn our attention to the numerous works of women who took Centre stage with their art during the last 500 years. Flavia Frigeri (2019, 2024) begins her history of women artists with Lavinia Fontana (1552-1614) followed by Artemisia Gentileschi (1593-1652). Both painters produced extraordinary paintings which brought their own touch to the paintings at a time when an independent expression through art was still largely reserved for men. The subjects of Gentileschi were greatly influenced by her experiences as a woman in a male dominated society in the 17th century in Europe. Her choice of subjects for her paintings added a female vision and depiction of biblical and historical narratives that were unique. The „Musée Jacquemart André“ in Paris featured a great retrospective of her art work in 2025. The catalog of the exhibition allows to enter into the art and wit of this early woman artist. 

Zadkine Van Gogh

Ossip Zadkine has been a sculptor in cubists’ art tradition. He created famous sculptures of Vincent van Gogh after the death of the renowned painter and his friend. The Zadkine museum in Paris allows to get a great impression of these artworks. These sculptures reveal an interesting life course perspective on both artists sensitivity and transformation of their impressions of others or emotions more generally. The first study depicted below by Ossip Zadkine of van Gogh shows how he carefully studied the traits of van Gogh and his personality in order to better understand the evolution and death of the fellow artist. The emotional and broader psychological aspects of a character captured both artists. Doing justice to these inner feelings and society’s judgments about art and artists at their time of creation had strong impacts on both artists. 

Sedentary Lifestyle

There seems to exist a correlation between a more sedentary lifestyle and the level of industrialization. Industrialized countries have attempted to beat the running of time by faster modes of transport. From horses to cars, trains and airplanes. As a corollary of wanting to go faster the number steps walking has decreased compared to countries with less private or public means of transportation. The the time you spend sitting in transport the less we tend to walk or cycle. Obesity has become a dangerous consequence for large parts of those sedentary individuals and sedentary societies. The contribution by Paul Klotz in “Le Monde” from 2025-7-26 (p.24) highlights the bio-psycho-socio co-determination of the sedentary lifestyle. Societal developments to build entire cities more suited to car and train traffic has made walking the city a stressful task. Rebuilding our cities with a focus for a society on the move again is a challenge for more than one generation.

Work time reduction

One of the major elements of social progress in the 20th century consisted in the reduction of work time. Reductions from 48 hours per week in the first half of the century were largely reduced to 40 hours per week or less in some industries with strong trade union representation. State regulations also pushed in this direction with positive implications for physical and mental health as well as wellbeing. Advances in longevity of employees may be attributable to this social progress agenda of the 20th century. In the 21st century we witness a new thrust of enterprises and employees striving to implement a 4 day work schedule by at the same time organizing a further reduction of work hours. The scientific evidence which is based on pre- and post trial assessments of workers satisfaction shows rather positive results (Fan, Schor, Kelly, Gu 2025). More studies are due to accompany this potential of further health and wellbeing effects of reduced work time and the reorganization of work time in enterprises. 

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) 

Electrifying Jobs

The transition to the “all electric society” necessitates to prepare the labor force for the upcoming challenge. The knowledge about electricity and electric appliances constitutes the basics of the knowledge base of the future. This goes far beyond the basics of physics and electrical engineering. There many processes like sharing of electric infrastructure in households, cities, in and beyond countries that have to be delt with. Investment calculations and legal issues to address the different risks involved are another area to cover in the process to prepare society for the “all electric society”.
However, the skills of professions with more direct links to the fossil fuel based technologies have a role in the phasing out of the heavy reliance on fossil fuels. Reverse engineering of such engines and heating will need people still knowledgeable of the past, when younger generations set their focus primarily on professions with links to electricity. Even using a solar powered heat pump in a home requires pipes to the existing network of radiators, for example. This will most likely be a gradual shift of the job structure and occupational requirements over at least a decade, but the shift has started already. Some might argue we need a well functioning “transitional labour market”, labour market policies and social security system for this to happen smoothly.

 

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.

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.

Work and Time

The link between work and time has been evolving as a major element of social progress over centuries. In what younger generations seem to take for granted, <40 hours week, paid time off-work. 4-5 days per week to name only the major ones, has been the result of huge struggles and hustles driven by employees and their trade unions to achieve such milestones. The current debate to get employees back into offices and/or to work longer hours again, is also in the end a debate about work and time. The advantage of working from home consists among other factors in saving a lot of valuable time and stress from commute to work. This unaccounted time to go to work has become a major health hazard even in an apparently comfortable company subsidized car or any other means of transportation. The traffic jams of so-called rush hours, when in fact everybody is slowed down, are a serious health hazard usually ignored by employers. However, these hours are a major part of the work-life-time balance of employees. In many negotiations and collective bargaining about working time this is the big elephant in the room rarely addressed.

Ultimate Step

Reports in the New York Times, The Guardian and Le Monde in recent weeks have brought to our attention that there are shocking ultimate steps undertaken by several employees of public services. In the case of the British post office a decade long inquiry has uncovered that 13 suicides of employees occurred after they had falsely been accused of fraud. A long time ago in France Telecom a series of suicides was also attributed to a harsh personnel policy. The Office of Public Finances (DGFiP) is confronted with a series of suicides in 20025 of 12 employees who apparently made the ultimate step to put an end to their life. Not all is to be blamed on the enterprises or public services concerned, however, they failed or omitted attempts to prevent the ultimate steps. Initiatives like peer listeners as anonymous contact points or access to psychological counseling are necessary parts of a responsible human resource practice, even if it might not be a sufficient condition to avoid the ultimate step in some instances. In many cases employees go far beyond their mental capacities in terms of commitment to their work, they should not be left alone in case of severe consequences.
Burn-out, for example, needs to be tackled as part of the responsibility of enterprises and public services alike. It is highly unfair to put the costs of psychological consequences on the shoulders of families and the state. Investigations into toxic leadership styles and the current revival of “workaholic” work ethos will have serious negative consequences for families and society as whole again.

Bench the benchmarks

In the social sciences as well as in engineering it is common practice to use benchmarks as indicators of performance. Thereby, several countries or regions within a country are compared with respect to quantitative indicator. Let’s take employment ratios. A higher employment ratio, which includes many persons working few hours in part-time work, is different from a slightly lower employment ratio, but hardly any part-time employees.
The same rationale holds true for benchmarks of AI systems or the newer versions of agentic AI that are under construction in many fields. The paper by Yuxuan Zhu et al. (2025) proposes the ABC (agentic behavior checklist) for agentic AI developers. The reporting of benchmarks by such models should include (1) transparency and validity, (2) Mitigation efforts of limitations and (3) result interpretation using statistical significance measures and interpretation guidelines.
The aim of this research is to establish a good practice in establishing benchmarks in the field of agentic AI. The sets of criteria to test for is large and the focus of how the agentic AI treats, for example, statistical outliers much above or below the average i.e. (> 2 standard deviations from the average) assuming a normal distribution, is one case of application only.
We welcome the efforts to bench the benchmarks in the field of AI as is common practice in other sciences as well.

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). 

Korean Epilogue

The exhibition on the Korean Provisional Government closed with a stimulating epilogue. The call on visitors to spread the message of peace resembles religious practices. The long struggle for Korean independence and freedom for the people in South Korea leaves them wishing the same for all Korean people and beyond 75 years after the beginnings of the Korean War. From a German and Eastern European perspective this unaccomplished wish resonates a lot. The small stickers with messages from visitors propose short thought pieces like “South and North Korea shall be together” and “Peace starts with inner peace”. The wisdom in these statements lies in not giving up on ideals, however distant they may appear. There is always the possibility of small steps ahead.

Social promise

In the beginning and middle of the 2020s the social promise to younger generations has been broken. The latest figures from the USA reveal that 2 million students (WSJ 2025-6-25 A3) who have financed their studies and potential social mobility by taking out a substantial loan are very likely to default on their credits. This observation was less a surprise to labor market analysts as the stalling of student hiring in many countries has happened for several years now. The more surprising finding is that the Wall Street Journal 2025-6-25 has been reporting on this. Banks or universities who are highly exposed to this kind of risk will themselves become downgraded for their credit rating. Higher interests for universities means higher fees and higher student loans eventually. The social promise to reach higher status and earnings through higher education as the social promise of the meritocratic society becomes an illusion. Investors in student housing might also find the sector less juicy for them. Students and their parents were taken hostage by an excessive commercialization and commodification od education. Lifelong learning is a still a promising route to revitalize the social promise.

Home financing

For most people the biggest investment decision during their entire life course is the decision how to finance their home. The calculation of the costs of a bank loan over 10, 15 or 20 years to finance the acquisition of a home is a necessary part of basic financial literacy. The contract of monthly installments over years, considering economic uncertainties like inflation and interest rate payments, necessitates some basic knowledge of calculus and maybe the use of a spreadsheet to prepare payment plans with different scenarios. According to the Wall Street Journal of 2025-6-25 many home owners in southern states “slipped under water” in recent months in the USA. In short, buying a house when they are most expensive with a high interest loan and little down payment puts you at high risk if the prices for homes decline, for example like in a recession or stagnation. You can find yourself in the situation that the mortgage you have to pay suddenly exceeds the value of your home at actual prices. It is really important to be aware of the overall economic situation and risks of changes, like interest rate or inflation spikes due to a changing policy on tariffs. Reading and learning about financial risks should really enter into the school curriculum, but not left to maths classes as this will frighten off many students to take this topic seriously enough. 

Home Leaks

When did you last think about leaks in your home?
Usually we associate leaks with water leaks, or the heating system leaking somewhere. In the 21st century leaks at home are more importantly the leaks of your home security, especially your email, digital and cloud services which are at risk. You may test your favourite AI system to advice you on your risks for digital leaks, but we know little whether these systems are yet another dangerous port of entry into your home or privacy themselves.
There is a helpful tool to find, whether your email has been hacked or distributed widely already for potential thefts of your identity. Hence, better check this from time to time using for example the “leak checker“, just like checking whether you closed your door or the water tap before leaving for vacations. As we live more and more in “virtual homes” in addition to our physical homes, checking your digital identities should become a part of our personal hygiene routine. Let’s just take a shower from time to time and change passwords regularly.

Better infrastructure

It doesn’t need much explanation to advocate better infrastructure. Even if we rarely agree on what constitutes better infrastructure, the lack of infrastructure is felt quickly. Almost everything we use on a daily basis like water, food or transportation rely on large scale infrastructure to facilitate individual uses. Companies settle where they spot good locations, most of them are related to infrastructure as well. The basics about infrastructure is the public versus private provision of such infrastructure and related services. Even a country’s defense hinges on good infrastructure to be able to respond quickly at the place where the defense is most needed. Telecommunication and satellites have been recent innovations in the field of infrastructure. Security and cybersecurity in particular are a critical component of infrastructure. The topic is huge. The means to address these issues are likewise of daunting scale. Therefore, it is all the more important to address these challenges.

Contextual Vision

The attempt to define a sociology of vision has had a hard time to build on hard evidence that vision may depend on context or in a broader sense your visual heritage. A standard definition of context in vision highlights the areas around a focal point. The findings by Krupin et al. (2025) show through the comparison of persons from very different populations that our vision depends on our cultural background. It is the social background and upbringing in a specific cultural setting, which determines what we see in an image at first sight.  The so-called Coffer illusion test (Deregowski 2017) reveals what we see in an image spontaneously and maybe after some longer staring at the image or doing it repeatedly, we learn to see that there is more to see than our original impression. Depending on our cultural heritage we might focus unconsciously on rectangular or round shapes in a geometric image. This fundamental finding questions the view that there is only one universal kind of vision common to all humans. In fact, there is variance around what we see and thereby how we perceive an image. This research provides a justification to delve also into the field of a sociology of the visual. Because of the common term in informatics “WYSIWYG”, (what you see is what you get), we might  spend more efforts on research of how human vision is shaped over generations or according to social background. We know that in some images different people see different things. What appears as a splendid opportunity for some, is a very risky situation for others. Eyes are so closely wired to our brain that inscriptions of vision on the brain functioning are quite likely. The plasticity of this process over the life course remains a crucial topic to understand the process(es) of how a person’s social background shapes her/his vision.

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.

Real dad-ication

The last few years there has been a stronger recognition of the need to get fathers more involved in caring for children. In the USA the #dadication became a symbol and an annual campaign to raise awareness to the importance of fathers to get involved in addition to mothers. The combination of fatherhood and dedication was shortened into “dadication” to reflect the combination of both elements that we not always considered to a natural part of fatherhood. It is a win-win-win situation as fathers gain emotional strength, children learn about parental styles and mothers get some relief from at times overwhelming family care.
In literature we have some great examples of caring or neglecting fathers. Famous are the letters to his father by Franz Kafka. Historically, fathers have often thought their role solely as ensuring a social status for their children, but nowadays the role patterns is much broader and much more emotional or psychological as well. As there are more “dadication” role models around, the song “Papa où te” (Dad, where are you?) will still be popular, but with more reassurance that children or adolescents have vivid memories of time spent together.

Ohm … Ohm

In the 21st century most people will interpret “Ohm … Ohm” as the exhalation in yoga  (Hatha yoga). Therefore, take a deep breath, hold it for a while (twice as long) and then exhale (thrice as long), for example. Now you are perfectly set up to read about Georg Simon Ohm (1789 – 1854), the physicist after whom Ohm’s law was named. In the “All electric society” Ohm’s law still plays a fundamental role for all households. The understanding of electric circuits is quite easy, just apply the basic relationship of Ohm’s law. In a resistor the current and voltage are proportional. The sign (SI) for resistance (R in physics) of a conductor is the Greek letter Ω. The proportionality is expressed as R = V/I where V is the Voltage and I the current through the conductor. The units are Ω, Volt V, Ampere A. All you need to know additionally is the calculation of the power P in Watt W where P = V x I for example. If you want or need to dig deeper into your home electricity just study a bit of electrical technology on the basics.
In our homes, apartments or offices we can apply this 200 years old knowledge to guide the safety and energy consumption of our electric installations. Maybe with the help of a spreadsheet programme like excel etc.

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.