B.R. Ambedkar was the chairman of the Drafting Committee of the Constituent Assembly of India.

The Drafting Committee was responsible for drafting the Constitution of India, which was adopted on 26th November 1949 and came into effect on 26th January 1950. The committee was formed on 29th August 1947, and it consisted of seven members.

- B.R. Ambedkar's role as the chairman:
B.R. Ambedkar played a crucial role as the chairman of the Drafting Committee. He was chosen for this position due to his expertise in constitutional matters and his commitment to social justice. Ambedkar had a deep understanding of the issues faced by marginalized communities in India and worked to ensure their rights and equality were enshrined in the Constitution.

- Ambedkar's contributions to the Constitution:
As the chairman of the Drafting Committee, Ambedkar made significant contributions to the Constitution. He played a key role in shaping the fundamental rights, which guarantee individual freedoms and protect citizens against discrimination. Ambedkar fought for the inclusion of provisions that would uplift the oppressed and marginalized sections of society, such as the Scheduled Castes and Scheduled Tribes.

- Ambedkar's influence on social justice:
Ambedkar's personal experiences as a member of the Dalit community influenced his perspective on social justice. He advocated for the abolition of untouchability and worked towards the upliftment of Dalits. Ambedkar's efforts led to the inclusion of provisions in the Constitution that outlawed untouchability and provided for affirmative action to promote social equality.

- Ambedkar's legacy:
B.R. Ambedkar's contributions to the drafting of the Constitution and his lifelong struggle for social justice have made him an iconic figure in Indian history. He is often referred to as the "Father of the Indian Constitution" due to his instrumental role in its framing. Ambedkar's vision of an egalitarian society continues to inspire generations and his principles of equality and justice form the foundation of India's democratic system.

In conclusion, B.R. Ambedkar was the chairman of the Drafting Committee of the Constituent Assembly of India. His leadership and contributions to the Constitution have had a lasting impact on India's legal and social framework.