Foundational treaties are essential agreements that establish the basic principles and frameworks for political entities, such as countries or organizations. These treaties often outline the rights, responsibilities, and governance structures that guide the relationships between the parties involved. Examples include the Treaty of Westphalia, which ended the Thirty Years' War and laid the groundwork for modern state sovereignty. These treaties can also serve as a basis for international law and cooperation. They often address issues like territorial boundaries, trade relations, and human rights. The United Nations Charter is another significant foundational treaty that promotes peace and security among nations.