Reciprocity

A movement begun in British North America during the 1840s for the bilateral reduction of tariffs between the British colonies and the USA; it resulted in the Reciprocity Treaty of 1854. The treaty negotiations represented an important step in the growth of Canadian political autonomy. Arrangements became a source of discord in Washington, however, and the Treaty was dissolved by the USA in 1866. Attempts to renew Reciprocity failed up to 1911, when the idea was finally shelved until the 1980s.

Reciprocity may refer to:

Ethic of reciprocity, a general philosophical principle of most philosophies and religions. Reciprocity (international relations), a principle that favours, benefits, or penalties that are granted by one state to the citizens or legal entities of another, should be returned in kind. Reciprocity (cultural anthropology) and in relation to non-market economic exchange (see economic anthropology), Structural anthropology and the concept of the gift (see Marcel Mauss) Reciprocity (mathematics) Reciprocity (electromagnetism), theorems relating sources and the resulting fields in classical electromagnetism. Reciprocity (photography), the relationship between the intensity of the light and duration of the exposure that result in identical exposure.