The pre-1990 Indian economy was characterized by a strong emphasis on protectionism, import substitution, and central planning. India's share of world income declined from 22.3% in 1700 to 3.8% by 1952 due to British colonial rule. After independence, the government prioritized heavy industry and public sector growth through five-year plans but saw limited success. Reforms began in the 1990s with liberalization of trade and investment policies to address fiscal and balance of payments crises, opening India's economy to globalization. Major reforms included trade liberalization, privatization, tax changes, and incentives for foreign investment and exports.