A scientific idea that should be better known [1]

Each year, the director of the website edge.org, John Brockman, asks a question to a group of intellectual collaborators, many of them belonging to the world of science but also personalities from the world of art, technology and of the music. The question he asked on January 1, 2017 was: Which term or scientific concept should be better known? According to psychologist and linguist Steven Pinker the second law of thermodynamics should be better known.