Sara Goldrick-Rab, a sociology professor at the University of Wisconsin-Madison, caused a firestorm last month when she publicly compared her governor, Republican Scott Walker, to Adolf Hitler in a tweet. She poured fuel on the flames by tweeting at incoming freshmen who were Walker supporters, encouraging them not to attend the school because of Walker’s education funding policies. Then, she apologized. Now she’s promoting a class she’s teaching this fall on “scholar activism.” The graduate seminar will “explore the biographies and narratives of a diverse array of scholar activists, examine the sociopolitical and economic forces shaping their work, and consider...