Writing at Power Line, Steven Hayward argues that by firing the fellow who wrote the memo criticizing the PC "police" at Google, the firm has actually made things worse for women. This is, of course, exactly the opposite of their intent.
Hayward shows how this can happen in work organizations and political parties. I've seen it at work in academia, where the knowledge that admission standards are lower for minority students translates into an assumption of lack of ability that may or may not be accurate.
