Hedging against an economy collapse

Regarding a collapse of the world economy...
While I think the chances are low, the consequences associated are high. 
I wonder, is there anything that can be done NOW to hedge against destiution, poverty, etc.

Since my parents, grandparents, great grandparents, etc have all gone through turmoil and upheaval of the Communist Revolution, WWII, the Great Depression, WWI, Spanish Inquisition, etc, I wonder if I'll have to face it too.

How to be prepared on the off-chance everything goes to hell?