Sometimes, I have to admit, it does seem like "psychopaths rule." There is even a whole Facebook page for those who see the world this way. Both George W. Bush and Barack Obama make the list, along with Hitler, Marx, Churchill, and Stalin.
Inherited and acquired psychological disorders and ignorance of their existence and nature are the primal causes of evil. The magic number of 6% seems to represent the number of humans who either carry the genes responsible for biological evil or who acquire such disorders in the course of their lifetime. This small percent is responsible for the vast majority of human misery and crime, and for infecting others with their flawed view of the world.
Whether or not some of our most celebrated political leaders have really been psychopaths (and I think that this remains a topic open for debate), I think the kind of participatory democracy that I advocate is probably the best antidote we've got.