Direct action originated as a political activist term for economic and political acts in which the actors use their power to directly reach certain goals of interest by, for example, revealing an existing problem, using physical force, highlighting an alternative, or demonstrating a possible solution. Both direct action and actions appealing to others can include nonviolent and violent activities which target persons, groups, or property deemed offensive to the action participants. Nonviolent direct action may include sit-ins, strikes, street blockades, sabotage, and counter-economics. Nonviolent direct action has historically been an assertive regular feature of the tactics employed
… Read more by social movements, including Mahatma Gandhi's Indian Independence Movement and the Civil Rights Movement. Anarchists organize almost exclusively through direct action, this manifests as a varied set of actions, non-violent or violent. Direct action is used by anarchists due to a rejection of party politics, and refusal to work within hierarchical bureaucratic institutions.
A black bloc is a tactic used by anti-capitalist protesters who wear black clothing, ski masks, scarves, sunglasses, motorcycle helmets with padding, or other face-concealing and face-protecting items. The clothing is used to conceal wearers' identities and hinder criminal prosecution by making it difficult to distinguish between participants. It is also used to protect their faces and eyes from pepper spray, which is used by police during protests or civil unrest. The tactic allows the group to appear as one large unified mass. Black bloc participants are often associated with anarchism, anarcho-communism, communism, libertarian socialism, antifascism, or the anti-globalization movement.
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The tactic was developed in the 1980s in the European autonomist movement's protests against squatter evictions, nuclear power, and restrictions on abortion, as well as other influences. Black blocs gained broader media attention outside Europe during the 1999 Seattle WTO protests when a black bloc damaged property of various multinationals. 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.