This list of peace activists includes people who have proactively advocated diplomatic, philosophical, and non-military resolution of major territorial or ideological disputes. through nonviolent means and methods. Peace activists usually work with others in the overall anti-war and peace movements to focus the world's attention on the irrationality of violent conflicts, decisions, and actions. They thus initiate and facilitate wide public dialogues intended to nonviolently alter long-standing societal agreements directly relating to, and held in place by, the various irrational, violent, habitual, and historically fearful thought-processes residing at the core of these conflicts, with the intention of peacefully ending the conflicts themselves.

A peace movement is a social movement that seeks to achieve ideals such as the ending of a particular war (or all wars), minimize inter-human violence in a particular place or type of situation, including ban guns, and often linked to the goal of achieving world peace. Means to achieve these ends include advocacy of pacifism, non-violent resistance, diplomacy, boycotts, peace camps, moral purchasing, supporting anti-war political candidates, legislation to remove the profit from government contracts to the Military–industrial complex, banning guns, creating open government and transparency tools,  direct democracy, supporting Whistleblowers who expose War-Crimes or conspiracies to create wars, demonstrations, and national political lobbying groups to create legislation. The political cooperative is an example of an organization that seeks to merge all peace movement organizations and green organizations, which may have some diverse goals, but all of whom have the common goal of peace and humane sustainability. A concern of some peace activists is the challenge of attaining peace when those that oppose it often use violence as their means of communication and empowerment.