The practice of handling situations with tact and skill, or the ideas and methods used by diplomats in negotiations.
From 'diplomat' + '-ism' (system or practice suffix). Created in the 19th century to describe the body of practices and principles used in diplomatic relations. Reflects the formalization of diplomacy as a distinct field of practice.
Diplomatism as a system emerged when countries realized that wars were expensive and talked-out disagreements saved money—so they invented a whole profession and set of rules around how to argue without fighting!
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