I'm familiar with those studies done at Stanford and Yale. They had to stop the experiment because so-called "normal, intelligent" students applied more electrical charge when directed to do so. What that study proved was that any "normal" person can become violent against others when directed to do so.
What has that got to do with any culture or society at large? We are not all prone to "experiments" or conditions to prove a point. Even amongst general conditions observed in any society, such as Naziism, there were people who were against it, and did heroic things to save Jews and others.
That doesn't prove anything about how people are prone to help other humans in need - whether through self-interest, greed, or charity.
The topic of this thread is "every action is selfish...."