Robert Trivers was the inspiration for E. O. Wilson to write “Sociobiology”, and whether because of Wilson drawing away the flak or Trivers’ own radical leftist politics (he worked with Huey Newton, to whom this book is dedicated) he was never as much a figure of controversy. Reading his Folly of Fools, it quickly became apparent that Robin Hanson “America’s Creepiest Economist” owes much of his thinking on signalling, status & hypocrisy to the research program Trivers pioneered. I haven’t yet read “The Elephant in the Brain”, so I can’t say whether he should be paying royalties, but anyone who is interested in that topic should definitely read this.