That's got nothing at all to do with what's just. Justice can be inconvinient. As for studying them to treat future criminals, well, there's a few issues. First, in the cases of bin Laden and Hussien, having a radical worldview isn't a disease. In the case of Manson, information from him could be used to treat two or three people ever, tops. Easier to cap 'em. For everyone else, the idea that you need to be sick to commit a crime is off in the first place.With respect to keeping people alive, there's no particular justice in killing them, and they make for excellent case studies. The likes of Osama Bin Laden and Saddam Hussein are absolutely fantastic examples: If the war on terror has made anything clear, it's that the US administration has no flipping clue how the minds of these men work. One line of reasoning justify the veracity of Bush's claims regarding a connection between the two, and the latter having WMDs, is the fact that both him and his experts were projecting their own biases, acting on what would seem to be obvious actions on the part of Saddam and Osama. Obvious because it's what they would do if situations were reversed. But why, knowing this is inherently flawed? Because they have an extremely limited library of counter-considerations. Each man's life story would make for volumes of case study material. With us now being warned by the likes of Rumsfeld of the ideological war on terror, the last thing we should be thinking about is cutting short the lives of our reference points.
The same applies to the likes of Charles Manson: In less heated battlefields they become central figures of psychology courses. These psychology students are then unleashed upon society better equipped to deal with such nutcases in the future. Holy cow, did we just come up with a proactive instead of a reactionary approach to treating the criminal mind? Or - get this - pursue the the notion that the criminal mind might actually be treatable through further study?
I don't think any punishment deters any crime. It isn't supposed to.Nah, that's just hippie garbage, I'd rather scare the weirdos straight with the threat of death! The threat of death works for me, and since I'm also obviously mentally unsound just like they are, surely it's the ideal solution to deter them as well! Besides, we all know that dangerous criminals are magical escape-artist voodoo doctors whose very continued existence slowly corrupts the prison system...