Some situations you can prepare for, others you can only accept your fate. I went through the same struggle after I lost everything but my wife and kids to hard times. I lost it all, but was still breathing. I rebuilt. I adapted. I overcame.
In a total breakdown of society, accepting your mortality does help. Some situations can be resolved, but there will come a time you face an adversary who will defeat you.
Never challenge a man who has nothing left to lose.