“The skill at unmasking error, or simple intellectual one-upmanship, is not completely without value, but we should be wary of creating a class of self-satisfied debunkers or, to use a currently fashionable word on campuses, people who like to ‘trouble’ ideas.” So says Michael S. Roth, president of Wesleyan University, whose reviews and essays I always make a point to read when I come across them.