The Basic Laws of Human Stupidity

There's something to be said for the academic pursuit of why idiots abound. Perhaps this guide, written in 1987, can help:

The Basic Laws of Human Stupidity

For example, the third law is astonishingly clear and concise: "A stupid person is a person who caused losses to another person or to a group of persons while himself deriving no gain and even possibly incurring losses." Nice pseudo-science writeup with Sergio Aragonés-esque illustrations.