> If you starve a wealthy man for 2 weeks he will be ready to cannibalize... People are the same everywhere.
> That is absolutely not true. People aren't the same even in adjacent neighborhoods sometimes. Some create great environments, some create hells on earth.
Sure. People are not the same in their current behaviors. People are the same in how they acquire their behaviors or change their behaviors based on the conditions of their environments. And sometimes these changes are very quick.
To give a very simple example, many people in my native country who would throw burning cigarette butts on the ground, stop doing so immediately when they, say, immigrate to the US. They didn't really change all of a sudden; what remains the same is the people's opportunistic ability to adapt to the conditions of their environment, regardless of what is moral, just, etc.