In 2016, amid an epidemic of police shootings of Black people, NFL quarterback Colin Kaepernick began a series of protests on the field, refusing to stand during the U.S. national anthem. By taking a knee, Kaepernick’s simple act spread like wildfire throughout American society, becoming a powerful symbol of resistance to the systemic racism in this country.

Listen in to hear author Dave Zirin speak about his latest book The Kaepernick Effect: Taking a Knee, Changing the World, as well as sports and resistance in the recent period. Dave Zirin is the sports editor of The Nation, a columnist for The Progressive, and the host of the Edge of Sports podcast. His many other books include A People’s History of Sports in the United States, Game Over, Bad Sports, and Welcome to the Terrordome: The Pain, Politics, and Promise of Sports.