I have a B.A. in Anthropology and Psychology. I was required to take several Sociology classes for my degree, and I'm really not a fan of the field, to be honest. Anthropology is the study of humankind, culture, and the history involving man and his culture. It's really a big picture look at the world. Sociology is the study of human society. They are both rather broad fields and they do overlap quite a bit. The job market, however, for each field is dramatically different. A lot of sociology majors, at least the ones that I know, go into social work or other similar careers. I, with an Anthropology degree, am currently working on my doctorate with plans to research and teach. It sounds like to me, if you're interested in the study of culture and humanity, which would be Anthropology, and why people, not societies or cultures, act the way they do, you may want to consider Anthropology and Psychology, not Sociology. But, with most of the social sciences, your undergraduate work just will not get you far. You will have to consider graduate school. If you want my advice, which I suppose you do, choosing a major can be complicated, but when it's all said and done, your major won't be that important. What you want to do is figure out what you want to spend the rest of your life doing, and go from there. Good luck!
B.A. in Anthropology and Psychology