Race and gender issues are frequently discussed together, but racial politics and gender politics are very different, historically and politically. Rights and injustices differ in degree, most dramatically perceived in the antebellum South, where many white women lived in plantation luxury through the hard work of black slaves. Both blacks and women campaigned vigorously for the vote, but blacks got the right to vote 50 years before women did. Nevertheless, blacks continued to suffer painful discrimination.
http://www.townhall.com/columnists/SuzanneFields/2008/01/17/politics_of_sex_and_race