There are at least 2 definitions of resilience: (1) a material definition points at the “ability to return to an original form or position after being compressed, extended or curved, and (2) a immaterial or psychological definition. The latter one describes the ability to recover, be happy or successful anew having overcome a bad or challenging experience. The American psychological literature defines resilience in the shortest form as “positive adaptation despite adversity”. The psychological construct is linked to a positive life span perspective of personal development. Other areas of application range from “resilient investments”, “resilient industries” to single resilient societies or intergovernmental organizations like the European Union or NATO.
The challenges to resilience increase with complexity of societies and social as well as technical systems. As supply chains have become longer in time and travelling longer distances as well, the improvement of resilience has become a steep challenge for globalization. Reorganizing supply chains with “own sourcing” as in countries which are cut-off from international trade will have huge consequences on sending and receiving countries.
Last, but not least, countries like Ukraine demonstrate the fact and virtue of resilience after more than 1000 days of the massive Russian invasion of its country, which threatened its survival. Resilience works best in networks of organizations and countries. Solidarity is a fundamental building block of resilience as well. Donations and funds support activities that foster resilience. 
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