The Two Nations theory can refer to:

• Two-Nation Theory, the view that Muslims and Hindus in Colonial India were separate nations
• Two nations theory (Ireland), the view that the Northern Ireland Protestants are a distinct Irish nation
• Deux nations or Two Solitudes (Canadian society), the view that French and English Canada are separate nations

See also

• Austro-Hungarian Compromise of 1867
• Biculturalism
• Binational solution
• Dualism (disambiguation)
• Hyphen War
• Multinational state
• Parallel state
• Taksim (politics)
• Two Chinas
• The two Spains
• Two-state solution (disambiguation)
• Two-state (disambiguation)

This disambiguation page lists articles associated with the title Two Nations theory.
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