August Wilson wrote 10 plays chronicling Black life in the 20th century. Ellen Schrecker, the leading historian of the McCarthy era's widespread purge of the U.S. education system, calls these gag bills "worse than McCarthyism." Schrecker, author of "No Ivory Tower: McCarthyism and the Universities," "Many Are the Crimes: McCarthyism in America" and "The Lost Promise: American Universities in the …