Sociology is the social science for people who don't have the math for economics, don't have the singleminded determination for psychology, don't care enough about politics for polisci, don't care enough about science for anthropology, and don't have enough language ability for linguistics.
Sociology is Anthropology Lite(TM). It's the study of society for people who don't like dealing with non-Western cultures. It's economics without all the math, and polisci without all the opinions. It's psychology without people. It's history for people who don't care about history.
Remember that sociology was originally started by a Frenchman who wanted to find out what was wrong with society and fix it. Sociology still has this idea that analyzing survey statistics will show what is wrong with people and how to change the world for the better.