WEEEEE!!! look at it go... anyway...
I think from a purely 'survival of the species' point of view, the Chosen one (and the vault dweller for that matter) were unspeakably evil. If you take that stance, then the enclave was clearly going to benefit humanity IN THE LONG RUN. Of course, its also this kind of 'pure' thinking that led Hitler to his 'final solution' so, I realy dont think people should take a 'survival of the species' point of view. Its just that you have to imagine the motives of the so-called 'bad guys'. From their POV, they were were acting in good conscience. They did what they felt was required to achieve their goals.
TheGreatTriscuit
P.S. once again, excuse the spelling