The first modern peace treaty was that of

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The first modern peace treaty was the Peace of Westphalia, signed in 1648 to end the Thirty Years' War between various European powers. It is considered to be the first modern peace treaty because it established the principles of sovereign nation-states and the concept of international law. The other options listed are not the first modern peace treaty. The Edict of Nantes (A) was a document granting Huguenots religious tolerance in France in 1598, and the Treaty of Utrecht (E) ended the War of the Spanish Succession in 1713. The other options (B and C) do not refer to specific peace treaties.

The First Modern Peace Treaty Was That of