Summary: Fifty Years of Modern India (1919-1969) by Vidya Dhar Mahajan provides a detailed account of the constitutional changes and nationalist movement in India from 1919 to 1969. The book covers the significant events like the Government of India Act, 1919, constitutional developments, Jallianwala Bagh tragedy, rise of nationalism, and key leaders like Jawaharlal Nehru and Jinnah. It also discusses important legislation such as the Indian Universities Act, 1904, the Official Secrets Act, 1904, and the Indian States (Protection) Act, 1934. The book analyzes the impact of British imperialism, the effects of World War I and II on India, and the agrarian reforms under the leadership of Jawaharlal Nehru to improve the condition of peasants. The author highlights the social, economic, and political challenges faced by India during this transformative period, including the Bengal famine of 1943. Through a comprehensive analysis of constitutional changes and nationalist movements, the book provides valuable insights into the journey of modern India towards independence and development.