For most of human existence, change happened slowly. For generations people hunted and foraged, or later farmed the land or kept animals. Not much changed. But that’s far from our experience today. We count change in years, not millennia. But why has this happened? It has happened because of memes. Memes (coined by Richard Dawkins) are bits of cultural knowledge that spread quickly between people. They are like a pandemic, passing from one person to another. But what is [...]