Why do we judge others ?

We judge people for survival reasons. If we couldn't judge people then we wouldn't be able to tell who is good or who is bad. If we didn't judge people, we wouldn't know what kind of people we get along with or not. We have to judge people in order to understand them. Yes, judging someone is bad if you are making baseless misconceptions about them but we have to rely on judgment in social situations in order to conduct ourselves properly.