Dissent is a sentiment or philosophy of non-agreement or opposition to an idea (eg. a government's policies) or an entity (eg. an individual or political party which supports such policies). The term's antonyms include agreement, consensus (when all or nearly all parties agree on something) and consent (when one party agrees to a proposition made by another).
Dissent may be expressed in many ways. In some political systems, dissent may be formally expressed by way of opposition politics, while politically repressive regimes may prohibit any form of dissent, leading to suppression of dissent and the encouragement of social or political activism. Individuals who do not conform or support the policies of certain states may be described as "dissidents," or in extreme cases, "enemies of the state". Several thinkers have argued that a healthy society needs not only to protect, but also to encourage dissent….