Author who first explored the impact of diversity on undergraduates in 2005 returns to her subjects as they reach 30 and finds new evidence of success of affirmative action. The results appear in The Impact of College Diversity: Struggles and Successes at Age 30, also published by Temple. In the book, Aries, the Clarence Francis 1910 Professor in Social Science at Amherst, outlines how and why affirmative action matters not just in the admissions decisions of colleges, but in the experiences of Black and white students to age 30.