This chapter explains how the FBI targeted Martin Luther King, Jr. as an exceptional and uniquely dangerous threat to the nation’s internal security. The author demonstrates the numerous efforts by the bureau to oppose the influential activism of King and the organization he led, the Southern Christian Leadership Conference. The chapter explains the important shifts in American culture that pitted the more radical activism of civil rights leaders against an increasingly strident FBI that was determined to thwart law abiding activists who challenged the nation’s mainstream racial politics. The author argues that the pivotal issue behind the FBI’s repression of King was not personal antagonism between King and Hoover but the politics of race and repression.