Fine--we want more women. Research, and personal experience, shows gender-mixed teams outperform [1][2][3][4]. This is a business, not HR, decision.
We also want more cultural diversity. I don't like pitching in Latin America or the Middle East with zero cultural context on the home team. If you're a B2C company, you probably want socioeconomic diversity on your product teams (at the very least).
[1] http://eepulse.net/include/content/articles/Wall_Street_Reac... IPOs
[2] http://scholarship.sha.cornell.edu/cgi/viewcontent.cgi?artic... Fund management
[3] http://scholarship.law.unc.edu/cgi/viewcontent.cgi?article=4... Boards
[4] https://www.researchgate.net/profile/Antonio_Vera/publicatio... Boards