Unlikely but not highly unlikely. If you expect to live for another 50 years, there is a nontrivial chance that you will face a crisis that happens once every 5

Unlikely but not highly unlikely. If you expect to live for another 50 years, there is a nontrivial chance that you will face a crisis that happens once every 500 or 1000 years on the average. Dying prematurely is one kind of risk, outliving your society is another.