The Elephant in the Brain: Hidden Motives in Everyday Life

by Kevin Simler

“Deception,” says the evolutionary biologist Robert Trivers, “is a very deep feature of life. It occurs at all levels—from gene to cell to individual to group—and it seems, by any and all means, necessary.” And our species, of course, is no exception. Suffice it to say that deception is simply part of human nature—a fact that makes perfect sense in light of the competitive (selfish) logic of evolution. Deception allows us to reap certain benefits without paying the full costs. And yes, all societies have norms against lying, but that just means we have to work a little harder not to get caught. Instead of telling bald-faced lies, maybe we spin or cherry-pick the truth. So far, so obvious. But here’s the puzzle: we don’t just deceive others; we also deceive ourselves. Our minds habitually distort or ignore critical information in ways that seem, on the face of it, counterproductive. Our mental processes act in bad faith, perverting or degrading our picture of the world. In common speech, we might say that someone is engaged in “wishful thinking” or is “burying her head in the sand”—or, to use a more colorful phrase, that she’s “drinking her own Kool-Aid.”