In just two weeks, two powerful Silicon Valley investors have resigned from the firms they cofounded after women accused them of sexual harassment.

The men, 500 Startups cofounder Dave McClure and Binary Capital cofounder Justin Caldbeck, didn't just cross the line once, according to the allegations. Multiple women -- both employees at their firms and female founders -- have come forward about their mistreatment of women.

Silicon Valley's power dynamics don't favor women and minorities. Investors tend to be white men: 89% of those making investment decisions at the top 72 firms are male, according to one industry survey. Many women have said they fear retaliation if they speak out about inappropriate behavior.

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