Manabendra Nath Roy (21 March 1887 – 24 January 1954), born Narendra Nath Bhattacharya, was an Indian revolutionary, radical activist and political theorist, as well as a noted philosopher in the 20th century. Roy was a founder of the Mexican Communist Party and the Communist Party of India. He was also a delegate to congresses of the Communist International and Russia's aide to China. Following the rise of Joseph Stalin, Roy left the mainline communist movement to pursue an independent radical politics. In 1940 Roy was instrumental in the formation of the Radical Democratic Party, an organisation in which he played a leading role for much of the decade of the 1940s.

The idea of the Constitution of India was first given by Shri M.N. Roy.

Who was M.N. Roy?
M.N. Roy was a philosopher, revolutionary, and political activist who played a significant role in India's independence movement. He was born in 1887 in Bengal and was a member of the Communist Party of India. He spent a considerable amount of time in Europe and was influenced by the Bolshevik revolution in Russia.

Contribution to Indian Constitution
M.N. Roy is known for his contribution to the development of the Indian Constitution. In 1934, he published a book titled "India's Problems of Constitution-making", in which he proposed a federal constitution for India. He outlined the principles of a federal government, division of powers between the centre and the states, and the importance of a Bill of Rights.

Roy's proposal for a federal government was based on the idea of decentralization of power, and he argued that a federal constitution would allow for the representation of diverse interests and prevent the domination of any one group.

Roy's ideas were influential in the drafting of the Indian Constitution. The Constitution of India, which was adopted in 1950, reflects many of the principles that Roy had advocated. The Constitution establishes a federal system of government, with powers divided between the central government and the states. It also includes a Bill of Rights, which guarantees fundamental rights to citizens.

Conclusion
In conclusion, although many individuals played a significant role in the development of the Indian Constitution, it was Shri M.N. Roy who first proposed the idea of a federal constitution for India. His ideas were influential in the drafting of the Constitution, and his contribution to the development of the Indian Constitution is widely recognized.

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