Diversity of tactics is a phenomenon wherein a social movement makes periodic use of force for disruptive or defensive purposes, stepping beyond the limits of nonviolence, but also stopping short of total militarization. It also refers to the theory which asserts this to be the most effective strategy of civil disobedience for social change. Diversity of tactics may promote nonviolent tactics, or armed resistance, or a range of methods in between, depending on the level of repression the political movement is facing. "It sometimes claims to advocate for "forms of resistance that maximize respect for life".
The first clear articulation of diversity of tactics appears to have emerged from Malcolm X and other radical leaders in the Civil Rights Movement of the early 1960s. Shortly after Malcolm announced his departure from the Nation of Islam, he gave a speech entitled "The Black Revolution" where he promoted solidarity between those who practiced armed resistance against racism, and those who practiced nonviolence. He stated:
In March 1964, Gloria Richardson, leader of the Cambridge Maryland chapter of the Student Nonviolent Coordinating Committee (SNCC), took Malcolm X up on his offer to join forces with civil rights organizations. Richardson (who’d recently been honored on stage at the March on Washington) told The Baltimore Afro-American that "Malcolm is being very practical…The federal government has moved into conflict situations only when matters approach the level of insurrection. Self-defense may force Washington to intervene sooner."
In the same year, Howard Zinn (then on SNCC’s Board of Advisers) published his essay "The Limits of Nonviolence," in the influential civil rights journal Freedomways. In the article, the historian concluded that nonviolent direct action would not be sufficient to break Jim Crow in the South. In his 1965 book, SNCC: The New Abolitionists, Zinn explained the philosophy that dominated the movement: