Scientists in the 20th century were overwhelmingly white and male. Therefore if biases were not at work, you'd expect the list of people who didn't get a Nobel

Scientists in the 20th century were overwhelmingly white and male. Therefore if biases were not at work, you'd expect the list of people who didn't get a Nobel and arguably should have to likewise be overwhelmingly white and male. That it is only half white and male suggests that top quality research by non-whites and non-males was systemically not rewarded.