Indian Constitution (Preamble ideals): The Preamble enshrines liberty, equality, and fraternity. Identify the historical movement that inspired these ideals in the Indian Preamble. Choose the correct source of inspiration.

Given data

• Preamble ideals cited: liberty, equality, fraternity.

Concept/Approach
The triad Liberty–Equality–Fraternity is historically associated with the French Revolution (1789) and influenced many modern constitutions, including India's.

Reasoning
• The phrase and its republican ethos trace to the French revolutionary tradition. • While the US Constitution influenced other aspects (federalism, judicial review), this specific triad is French.

Final Answer
French Revolution