RICHARD EPSTEIN OF THE HOOVER INSTITUTE ON GENDER@FACEBOOK:

The best explanation for the lack of gender parity at organizations like Facebook is that the founders are self-selected from a larger talent pool of males at the far right of the ability distribution, without any affirmative action pressures. In starting new companies, major entrepreneurs—from Bill Gates to Mark Zuckerberg—do not have to share their wealth. But once these superstars create a successful firm, like Facebook, they choose to use some of their profits to subsidize female engineers for a variety of reasons—which, as private firms, they are entitled to do. But any claim that they act with some form of implicit bias against female engineers is, as of yet, not supported by any credible evidence.

Since when do SJWs need actual evidence to agitate? Particularly when the base needs to remain fired up (read: really angry) for 2018 and 2020.