Godwin's law (also known as Godwin's Rule of Nazi Analogies or Godwin's Law of Nazi Analogies[1][2]) is an observation made by Mike Godwin in 1990[2] that has become an Internet adage. It states: "As an online discussion grows longer, the probability of a comparison involving Nazis or Hitler approaches 1."[2][3] In other words, Godwin observed that, given enough time, in any online discussion—regardless of topic or scope—someone inevitably makes a comparison to Hitler and the Nazis.