I'll say AynRandLand for another reason. After religion is destroyed, greed by and large will be destroyed. Most people are naturally benevolent, they need religion/superstition/junk science to feel they have a superior standing than others and therefore justify their greed. Societies in which religion is powerful breed this type of thought.
There are numerous sources of greed and general non-benevolence outside of religion to make it obvious that this is absurdly optimistic. Sociopaths who lack any empathy for others aren't going to disappear from the population just because one avenue of being predatory to others is lost to them. Tribal mentality, which often decides whether or not a person feels they need to be benevolent to another person, isn't going to go away either. Resource scarcity isn't going anywhere either, so there will be people who hoard. There is plenty of secular greed in the world.