Andrew, the majority of the examples of people doing bad as you put it were established BEFORE religion came to the people of a certain area. For example honor killings, female circumcision, etc. were practices that the people's convictions told them were upright and correct. It wasn't until religion came to the people that mankind started to see these barbaric acts have no place in society.

"I don't think so. Homey don't play dat."
Homey Da Clown