Another peculiar part of the WEIRD toolkit is our fixation on time. We budget it, struggle to save it, agonise over losing it. We count days, hours and seconds. We are always oriented to exactly where we are on the long arrow of history. In the United States, for example, when doctors screen patients for cognitive impairment, one of the first questions they ask is the year, month and date.

How the world became cognitively samey: the scientific, humanistic and ethical implications of global WEIRDing.