Remaking The World

Painting by Martin Johnson Heade

“There are two ways to make a group,” says Emiliano Bruner, a paleo neuroscientist at the National Research Center for Human Evolution in Burgos, Spain. “First, you can rely on what people have in common, giving importance to similarities. Alternatively, you can stress the differences toward another group. Both strategies can work, but in the first case you bet on love, which is often difficult, because it requires the acceptance of our differences. In…