I doubt anything will beat property ownership, agriculture, and money, in that order. I reckon if you remove those these three things and wait a year and the human race will be unrecognizable from a cultural point of view.
I guess we could tell them "communism is bad" but that's a bit too cold war even for me.
Maybe I'm too idealistic, but I could imagine a society where everything is communal. I just think we started off in a way that would make it too difficult to transition to that now (too many people have too much to lose).
0. http://files.hawaii.gov/dcca/reb/real_ed/re_ed/ce_prelic/lan...