Diplomacy (from the Greek δίπλωμα, "official document conferring a privilege") is the art and practice of conducting negotiations between representatives of states. It usually refers to international diplomacy, the conduct of international relations through the intercession of professional diplomats with regard to issues of peace-making, trade, war, economics, culture, environment, and human rights. International treaties are usually negotiated by diplomats prior to endorsement by national politicians. In an informal or social sense, diplomacy is the employment of tact to gain strategic advantage or to find mutually acceptable solutions to a common challenge, one set of tools being the phrasing of statements in a non-confrontational, or polite manner.
The scholarly discipline of diplomatics, dealing with the study of old documents, derives its name from the same source, but its modern meaning is quite distinct from the activity of diplomacy.
Some of the earliest known diplomatic records are the Amarna letters written between the pharaohs of the Eighteenth dynasty of Egypt and the Amurru rulers of Canaan during the 14th century BC. Following the Battle of Kadesh in c. 1274 BC during the Nineteenth dynasty, the pharaoh of Egypt and the ruler of the Hittite Empire created one of the first known international peace treaties which survives in stone tablet fragments, now generally called the Egyptian–Hittite peace treaty.