I know plenty of people who've lived in the same neighborhood for YEARS and have never done drugs, never drank, some still haven't had sex yet--THEY'RE MY AGE!! Most I grew up with in school or church, some I've met from moving to different parts of the hood through out my life.
Either way, you can't say that it's solely the social conditions alone. A lot of people of the same race often stick together, they often create stereotypes--not only for others--but for themselves by acting in ways that they think makes them different from other races. Be you Asian, Black, White, or Latino it's all the same.