Never has a human population been found that has no racial stereotypes. Not in other cultures or far-flung countries. Nor among tiny tots or people with various psychological conditions.

Until now.

Children with Williams syndrome, a rare genetic disorder that makes them lack normal social anxiety, have no racial biases. They do, however, traffic in gender stereotypes, said study researcher Andreas Meyer-Lindenberg of the University of Heidelberg in Germany.

Read More: Individuals with Rare Disorder Have No Racial Biases