The correct answer is Russian Revolution. Explanation & Key Takeaways: • The Preamble of the Indian Constitution declares the resolve to secure for all its citizens Justice in three distinct forms: Social, Economic, and Political. • These ideals of Justice were inspired by the Russian Revolution of 1917, which sought to create a society based on egalitarian principles and the end of exploitation. • Social Justice implies that the Constitution aims to create a society without discrimination based on caste, creed, religion, sex, or place of birth, ensuring the improvement of conditions for backward classes and women. • Economic Justice refers to the elimination of glaring inequalities in wealth, income, and property, ensuring that economic resources are distributed to serve the common good. • Political Justice ensures that all citizens have equal opportunities to participate in the political process, including the right to vote and access to public offices without discrimination. • The Preamble acts as an introductory statement that sets out the guiding principles and philosophy of the Constitution of India. Related Concepts: • French Revolution (1789): • The Indian Constitution borrowed the ideals of Liberty, Equality, and Fraternity from the French Revolution. • It emphasized the rights of man and the republican form of government. • American Revolution (1776): • This revolution influenced the concept of a Written Constitution and the inclusion of a Bill of Rights (transformed into Fundamental Rights in India). • Other features borrowed from the USA include the Independence of the Judiciary and Judicial Review. • Glorious Revolution (1688): • Occurring in England, it established the Supremacy of Parliament over the monarchy. • It laid the foundation for the Parliamentary form of government that India adopted from the British Constitution.