Leonard Mlodinow, in his excellent book Subliminal, writes, “We usually assume that what distinguishes us [from other species] is IQ. But it is our social IQ that ought to be the principal quality that differentiates us.” He points out that humans have a unique ability to understand what other people are like and how they are likely to behave. The brain comes programmed to develop this ability; by the time they are four years old, most children are able to read others’ mental states. This sort of human understanding and cooperation is what makes us so accomplished as a species. As Mlodinow explains, “Building a car for example requires the participation of thousands of people with diverse skills, in diverse lands, performing diverse tasks. Metals like iron must be extracted from the ground and processed; glass, rubber, and plastics must be created from numerous chemical precursors and molded; batteries, radiators and countless other parts must be produced; electronic and mechanical systems must be designed; and it all must come together, coordinated from far and wide, in one factory so that the car can be assembled. Today, even the coffee and bagel you might consume while driving to work in the morning is the result of the activities of people all over the world.”
