On this installment of ST, we speak with author Norm Stamper, who was a police officer for more than 30 years, first in San Diego and then in Seattle, where he retired as that city's police chief. He is widely credited as the architect of the nation's first community policing program and served as a founding member of President Bill Clinton's National Advisory Council on the Violence Against Women Act.

On this edition of ST, we speak with Dr. Lawrence Aber, the Willner Family Professor of Psychology and Public Policy at the Steinhardt School of Culture, Education, and Human Development at New York University, where he is also a University Professor. Dr. Aber is an internationally respected expert on child development, poverty, psychology, and how all of these relate to social policy.

On this edition of ST, we speak with the well-regarded author, essayist, and cultural critic Chuck Klosterman, who has published a number of books and also writes the weekly "Ethicist" column for The New York Times Magazine. Klosterman's latest title, "I Wear the Black Hat: Grappling with Villains (Real and Imagined)," is just out in paperback; it's a far-reaching, often funny, and highly entertaining exploration of why we as a society are so attracted to -- yet also, of course, repelled by -- villains both fictional and well as the very notion of villainy itself.