Harvard University was hit with a federal lawsuit this week, alleging that its admissions policies discriminate based on race and ethnicity, particularly against Asian-Americans. Filed in U.S. District Court for Massachusetts by the Students for Fair Admissions, the lawsuit compares Harvard’s treatment of Asian-American applicants today to the way it considered Jewish applicants years ago. And it suggests ways Harvard could go about creating racial and ethnic balance in its student population, including eliminating what the lawsuit terms legacy preferences.