To what extent is a wrong-doer responsible for their actions? If a person is not responsible for their own actions, it doesn't seem quite right to punish the person. For instance... If a homicidal maniac is driven to do evil things by an uncontrollable compulsion, do we say that this person is evil and should be punished or do we say that he has a mental disorder that makes him non-responsible for his own actions? If the answer is the latter, can anyone ever be responsible for any wrong-doings that they do? If an investment banker runs a fraudulent pyramid scheme that ruins the lives of hundreds of people, do we say that the banker is just an evil bastard who needs to go to jail. Or, alternatively, do we make the assessment that "no normal person who can control their actions would purposefully ruin the lives of hundreds of people". Therefore, this banker must suffer from a mental disease that makes him irresponsible for his own actions. Any thoughts?