I have always interested in psychology and never properly studied psychology in my life. But over the years I have learned about many things by learning about famous psychology experiments. However I cannot seem to get sufficient enough information to ‘understand’ human’s fundamental social behaviors or social interactions. I am having trouble finding information about how people socially interact at public spaces such as schools and work. It is quite clear that people with same interest or personality will hang out with each other but I cannot find any facts about this. In detail is there any study done to understand fundamental building blocks of human social psychology to understand their social behaviors in public spaces: how they make decisions, why they choose to lie, why they kiss asses, why they hang around with people they always do, why some people just don't care about things, why some people in power do not act or care, why some people only care about publicity... why why why... Where should I start to understand this broad question? Or should I break it down?