You're confusing the way things are versus the way things should be. Evolutionary biology explains the way things are. Diversity measures combats that with the goal of getting us to the way things should be. There are a host of reasons why things are the way they are now. The memo tries to offload some of that to biological explanations and cites studies. Then he makes a leap of faith and recommends the should based on that. The studies only explain why things are the way they are, not whether that is a good or a bad thing.
Specifically, he says at the top of the memo "Discrimination to reach equal representation is unfair, divisive, and bad for business." I'm not aware of any studies that backs this up.
Specifically, he says at the top of the memo "Discrimination to reach equal representation is unfair, divisive, and bad for business." I'm not aware of any studies that backs this up.