Why is intelligence declining?
In 1906, the famous polymath Sir Francis Galton visited a country fair on the edge of Plymouth, England. A bullock had been tethered for slaughter and almost 800 locals were invited to guess its dressed weight: how heavy it would be after butchering. Galton – an obsessive measurer of people, weather and intelligence – gathered the entries, calculated the average and found something remarkable. The crowd’s collective estimate came within a single pound of the ox’s actual weight. This elegant experiment would become one of the founding truisms of modern democratic thought. Galton had shown that while individuals may err, the group, in aggregate, can reason with uncanny accuracy and prescience. He had discovered “the wisdom of crowds.
