The five laws of Stupid people.

This theory was echoed in In 1976, when Carlo M. Cipolla, a professor of economic history at the University of California, Berkeley published an essay outlining the 5 fundamental laws of a force he perceived as humanity’s greatest existential threat: Stupidity:

Law #1: Always and inevitably, everyone underestimates the number of stupid individuals in circulation.

Law #2: The probability that a certain person is stupid is independent of any other characteristic of that person.

Law #3: A stupid person is a person who causes losses to another person or a group of persons while self deriving no gain and even possibly incurring losses.

Law #4: Non-stupid people always underestimate the damaging power of stupid individuals.

Law #5: A stupid person is the most dangerous type of person.