No one can predict a natural disaster or world crisis. When a hurricane or flood or a pandemic strikes a country, who is most likely to respond first? Which economic system is the best solution to handling a crisis of epic proportion?

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Your question is fraught with generalities and ill-defined words.

what do you mean "to respond" first?

What do you mean by "best"?
What do you mean by "handling"?

Here in Texas, many of those who head our government or who are running for President stated "best" is left to local initiative, and handling means making money from the situation.

And I suspect others are around who believe that nonsense also.