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Plenipotentiary


The word plenipotentiary (from the Latin, plenus + potens, full + power) has two meanings. As a noun, it refers to a person who has "full powers". In particular, the term commonly refers to a diplomat fully authorized to represent a government as a prerogative (e.g., ambassador). As an adjective, plenipotentiary refers to something—an edict, assignment, etc.—that confers "full powers".

Before the era of rapid international transport or essentially instantaneous communication (such as telegraph in the mid-19th century and then radio), diplomatic mission chiefs were granted full (plenipotentiary) powers to represent their government in negotiations with their host nation. Conventionally, any representations made or agreements reached with a plenipotentiary would be recognized and complied with by their government.

Historically, the common generic term for high diplomats of the crown or state was minister. It therefore became customary to style the chiefs of full ranking missions as Minister Plenipotentiary. This position was roughly equivalent to the modern Ambassador, a term that historically was reserved mainly for missions between the great powers and also relating to the dogal (city) state of Venice.

Permanent missions at a bilateral level were chiefly limited to relations between large, neighboring or closely allied powers, rarely to the very numerous small principalities, hardly worth the expense. However, diplomatic missions were dispatched for specific tasks, such as negotiating a treaty bilaterally, or via a conference, such as the Imperial Diet of the Holy Roman Empire. In such cases, it was normal to send a representative minister empowered to cast votes. For example, in the Peace Treaty of Versailles (1783), ending the American Revolution, John Adams, Benjamin Franklin and John Jay were named "minister plenipotentiary of the United States" to the Netherlands, France and Spain, respectively.


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