Innocent men have been put to death under the Death Penalty. Therefore, man's judgement process is fallible at some level and I cannot condone it.
Of course, I also think that the "War on Drugs" is ridiculous. Someone that I was talking to the other day actually thought that a huge amount of people would be out bootin' black tar heroin right after all drugs were made legal. I personally don't see it. Who actually thinks that people are prevented from doing drugs because they are illegal? Not very many. The percentage that would "experiment" with newly legal drugs would be infinitesimal.
Kinda like the percentage of people that are prevented from committing crimes because they are illegal.
What is the point of prison, in our 21st Century civilization? Punishment, or Rehabilitation? Some prisons have good voc-tec programs and education, and the rest are pretty much just Crime University.
I think you are giving people a little bit too much credit. The Death Penalty also serves a huge deterrant. Think of the converse - how many crimes of passion are prevented by fear of punishment? Is there any data or studies to support that people are prevented from doing crimes because they are illegal? That would be extremely hard to research.
I do agree that man's judgement is fallible and that prisons serve as nothing more than a place for criminals to learn how to commit crime better. The rehabilitation process really doesn't work - except because people don't want to go back!
People's moral compasses really aren't that strong. The basis of human nature is to satisfy our own needs and desires - law is what deters the vast majority of people from doing that. Try to think of it in an objective manner and by extension. If there were no laws, what boundaries would you start to push? It would start with speed limits probably, then the occassional robbery...but just when you need it, eventually, people would be killing each other.