Basic Laws of Human Stupidity

Law One:
Always and inevitably everyone underestimates the number of stupid individuals in circulation.

Law Two:
The probability that a certain person be stupid is independent of any other characteristic of that person.

Law Three:
A stupid person is a person who causes losses to another person or to a group of persons while himself deriving no gain and even possibly incurring losses.

Law Four:
Non-stupid people always underestimate the damaging power of stupid individuals. In particular non-stupid people constantly forget that at all times and places and under any circumstances to deal and/or associate with stupid people always turns out to be a costly mistake.

Law Five:
A stupid person is more dangerous than a bandit.

Carlo M. Cipolla