Even after some study in sociology, I still don't get what it's about.

It contains elements of economics... but economics is more interesting to study. It contains a lot of elements of social psychology... but social psychology is a whole lot less hand-waving (and it's more interesting). It contains elements of political science... but political science is a fuckload more interesting. It contains elements of history... but (you get the idea).

Someone really needs to enlighten me.