A new documentary on PBS Monday night explores the unconscious racial prejudices we all have - what is known as implicit bias.

"American Denial" looks back on the work of Gunnar Myrdal, a Swedish sociologist who compared the American ideals of equality and democracy with the reality of life for African-Americans in the South in the late 1930s. 

More than 70 years since Myrdal's work was published, what role does implicit bias play in society today?

Christine Herbees-Sommers, one of the producers of "American Denial," explains more.