英语高手请进!!(在线等)

As we know, the rate of committing crimes are becoming increasly high,especially in The United States.Now there's not yet been figured out why people commit crimes,even some scientists have been puzzled.
Therefore, I'd like to share with you some of my opinions that how I regard crime committing.There are generally three reasons for that.
Firstly,crime committing can bring them some benefits,regardless of how many they can get.This kind of behaviour may be done actively or passively.People who commit crimes are classified into two groups:optimistic and pessimistic.Optimistic people are unwilling to do crimes,but there are some reasons that force them to .Pessimistic people are those who take it as their life,they just want to get happiness from others' sadness.
Secondly,People commit crimes accidentally,like killing someone without consciousness,or that happens by chance.Those people will feel regretful for their behaviour.
Thirdly,people who are mentally disabled who commit crimes for nothing.They don't know what they are doing,and what they did is far beyond human realization.Generally speaking, those people should be kept in asylum and released only when they have been completely cured.
To sum up,people commit crimes positively or negatively,purposeful or unconsciously.More evidence should be raised if you want to go into detail.