A writer and co-author who partnered with Steven Levitt on several books, including "Freakonomics," and is the producer and host of Freakonomics Radio. He explores the hidden side of societal behaviors and choices.

A sociologist who studied the dynamics of urban gangs during his time at the University of Chicago. He gained firsthand experience by embedding himself with a crack cocaine gang.

A college-educated leader of a local drug gang known as the Black Disciples, who played a significant role in guiding Sudhir Venkatesh during his research. His strategic thinking helped increase the gang’s profitability.

An anti-bigotry writer known for infiltrating the Ku Klux Klan and exposing their secrets to the public to undermine their power.

An economist who examines racial disparities in the United States, particularly in education and police use of force. His research provides insights into the social challenges faced by African Americans.

A police chief who implemented innovative crime reduction tactics in New York City and Los Angeles, credited for his role in decreasing crime rates during his tenure.

A Nicaraguan responsible for the mass importation of crack cocaine into the United States, who claims to have been protected by the CIA to support the Nicaraguan Contras.