Just to play the devil's advocate: everyone here talks about being God-fearing, church, religion, and so on.
I consider myself to be intelligent and creative. I may have to undergo personal risk and act in a covert manner, but I will make a sincere attempt to retain my principles and act according to my conscience and my faith.
I may not be able to be as generous as I would like post SHTF, but I will certianly try.
I accept--as an article of faith--that generosity is a good thing. I don't equate "loving my neighbor as myself" to be a sign of weakness.
The recurring themes in the Holocaust (or Shoah) were a willing, voluntary blindness to what was happening around you, an unwillingness to take risks for your fellow man, an unwillingness to speak up, and an unwillingness to share.
These strategies didn't work in the long run.
So, I plan to be as generous as I can be, and define my survival by who I am as a person...not just by how long I can outlive the barbarians.