United Nations Conference on Sustainable Development in the context of Brazil

A protest (also called a demonstration, remonstration, or remonstrance) is a public act of objection, disapproval or dissent against political advantage. Protests can be thought of as acts of cooperation in which numerous people cooperate by attending, and share the potential costs and risks of doing so. Protests can take many different forms, from individual statements to mass political demonstrations. Protesters may organize a protest as a way of publicly making their opinions heard in an attempt to influence public opinion or government policy, or they may undertake direct action in an attempt to enact desired changes themselves. When protests are part of a systematic and peaceful nonviolent campaign to achieve a particular objective, and involve the use of pressure as well as persuasion, they go beyond mere protest and may be better described as civil resistance or nonviolent resistance.

Various forms of self-expression and protest are sometimes restricted by governmental policy (such as the requirement of protest permits), economic circumstances, religious orthodoxy, social structures, or media monopoly. One state reaction to protests is the use of riot police. Observers have noted an increased militarization of protest policing in many countries, with police deploying armored vehicles and snipers against protesters. When such restrictions occur, protests may assume the form of open civil disobedience, more subtle forms of resistance against the restrictions, or may spill over into other areas such as culture and emigration.