New Delhi, July 29 -- The covid-19 epidemic will not be the last problem to become a global crisis. The world is bound to face more such problems in the future. What is the key learning from the present crisis that we should keep in mind while tackling similar challenges that may arise?

There are different types of problems in the world. These can be classified on the basis of two parameters. One parameter of evaluation is whether the key behaviours causing the problem occur in a continuum from our private space to the public space. The other parameter for consideration is whether the problem is caused by an individual's behaviour or by group behaviour.

Based on this framework, most problems around the world can be classified as those o...