> In general, undeveloped countries seem to have fewer problems with psychopaths (disregarding the ones in charge). I find this immensely curious.

My pet hypothesis on this is that humans are wired to cope with extreme stress, scarcity, and violence. In an environment of relative peace and abundance we develop a whole host of neuroses. Most cope through entertainment, drugs, and other outlets, but some just totally flip out.

It's like what happens to hunting and working dog breeds when cooped up in a little apartment. They start eating the furniture, digging holes in the walls, chewing lesions into their skin, etc. Watch a large predator animal walk nervously in circles in a zoo.