Democracy was never meant to be a free-for-all. Restricting who can vote has a long precedent in the United States, and I believe in having all sorts of restrictions as the common man doesn't really understand politics or know the candidates.
As for the facts and data, just look at how the following things have been affected since the women's lib movement: Divorce rates (WAY UP), out-of-wedlock births (WAY UP) and entitlement spending (WAY UP).
Feminism, seen one way, is an attack on the traditional nuclear family. The traditional nuclear family is the best known model for providing stability and a good nurturing environment for the next generation. For this reason, feminism has done more harm than good.
It's not as if women were oppressed before. Women have always been women, cunning and able to get what they want.