In each case, however, Banaji, Greenwald and DiTomaso might argue, we strengthen existing patterns of advantage and disadvantage because our friends, neighbors and children’s classmates are overwhelmingly likely to share our own racial, religious and socioeconomic backgrounds. When we help someone from one of these in-groups, we don’t stop to ask: Whom are we not helping?

Banaji tells a story in the book about a friend, Carla Kaplan, now a professor at Northeastern University. At the time, both Banaji and Kaplan were faculty members at Yale. Banaji says that Kaplan had a passion — quilting.

“You would often see her, sitting in the back of a lecture, quilting away, while she listened to a talk,” Banaji says.

In the book, Banaji writes that Kaplan once had a terrible kitchen accident.