Age of Civilizations 2. They are used when one does Diplomatic Actions with another civilisation. If one does not have enough diplomacy points, they cannot do any of the things that use diplomacy points. Diplomacy points are gained each turn. This amount gained is increased by a high Technology level, a large size and enough enemies, while it is decreased by having too many friendly civilisations and diplomatic actions that regularly reduce the amount gained, like alliances and non-aggresion pacts.
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