During the 1960s and 1970s the American social movement for equal employment opportunity (EEO) succeeded in getting Congress and the courts to prohibit discrimination in employment on the basis of race, religion, national origin, and sex. We believe that the effectiveness of EEO laws depends not just upon their passage, however, but also upon their continuing successful mobilization. This is the first article to describe quantitatively the extent and outcomes of the mobilization of EEO laws at the appellate court level. It shows that mobilization is increasing; that the federal government and various interest groups are actively involved in the enforcement process; that much is at stake in many EEO cases; that alleged victims of discrimination win their court cases over half the time; and that reverse discrimination in EEO does not seem to be a serious problem.