With all our institutions, from the police force to academia, from medicine to politics, we give little attention to the people who leave—that process of elimination that goes on all the time and which excludes, very early, those likely to be original and reforming, leaving those attracted to a thing because that is what they are already like.
— Doris Lessing, 1971

Also Check out:

Taylor Lab - Diversity in STEM

Danielle Lee - The Urban Scientist