Why do people commit street crime?

there are loads of different reasons why people commit street crime as there is many types of street crime. there is robbery, murder, battering, slashing, drug dealing and more.

robbery can be stealing someones purse,wallet, bag or other valuables etc phones or jewelry. they might have to do this to get money to live as they cant get a job or it could be to pay a debt to someone who is threatening them. it could be a dare amongst friends to see if they are "man enough" or woman enough for that matter. it could be just because someone is bored and does it for the pure thrill of running away with stuff that they can sell for an extra £200 in their pocket.

murder,battering and slashing kind of come together in this one. they only happen for 2 reasons. 1. for revenge 2. in defence