Our tendency to generalise rests on a deeper fallacy - the idea that “black” refers to a genetic type. We put people of dark skin in a box labelled black and assume that a trait shared by some is shared by all.

The truth is rather different. There is far more genetic variation within racial groups (around 85%) than there is between racial groups (just 15%). Indeed, surface appearance is often a highly misleading way of assessing the genetic distance between populations.

This evidence demonstrates how absurd it is to engage in racial generalisations - how crazy it is to witness a tiny group of black people winning at, say, the 10,000m and to infer that all people who share the same skin colour share an aptitude for 10,000m running.