Nation-states join forces to establish alliances. War is fought by nation-states. Laws are enforced by nations.
A system of checks and balances between the executive and legislative branches of government, as well as the separation of powers, are all important aspects of liberal democracy. Liberal democracies often have multi-party systems with at least two enduring, viable political parties.
One of the guiding principles of democracy is the freedom from unjustified governmental deprivation of one's right to life and liberty, which includes the freedoms of assembly, association, property rights, speech, inclusivity and equality, citizenship, consent of the governed, voting rights, and minority rights.
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