Amartya Kumar Sen (born 3 November 1933) is an Indian economist and philosopher, who since 1972 has taught and worked in the United Kingdom and the United States. Sen has made contributions to welfare economics, social choice theory, economic and social justice, economic theories of famines, decision theory, development economics, public health, and measures of well-being of countries.
He was awarded the Nobel Memorial Prize in Economic Sciences in 1998 and the Bharat Ratna in 1999 for his work in welfare economics. He is currently the Thomas W. Lamont University Professor at Harvard University and a member of Trinity College, Cambridge.
Early Life and Education
Sen was born in Santiniketan, Bengal. His father Ashutosh Sen was a professor of chemistry at Dhaka University, and his mother Amita Sen was a writer and close associate of Rabindranath Tagore. Tagore himself chose the name “Amartya”, meaning “immortal” or “heavenly”.
Sen began his formal education at St. Gregory’s School in Dhaka. Following the partition of India in 1947, his family moved to West Bengal, and Sen studied at Santiniketan’s Patha Bhavana school, which emphasized outdoor education and critical inquiry. He went on to study at Presidency College, Calcutta, where he earned a BA in Economics with first-class honors. He then entered Trinity College, Cambridge, in 1953, where he earned his BA, MA, and PhD in Economics under the supervision of prominent economists Joan Robinson and Piero Sraffa.
Key Economic Theories
Sen’s academic contributions are widely credited with restoring an ethical dimension to the discussion of vital economics.
1. Social Choice and Welfare Economics
Sen’s early work focused on social choice theory. His landmark monograph Collective Choice and Social Welfare (1970) solved problems raised by Kenneth Arrow’s impossibility theorem. Sen showed how societies could make democratic and rational decisions about distribution and resources by incorporating non-utility measurements like liberty, health, and education.
2. Analysis of Famines and Poverty
In his highly influential book Poverty and Famines: An Essay on Entitlement and Deprivation (1981), Sen investigated the causes of major famines, including the devastating Bengal Famine of 1943.
Sen made a groundbreaking discovery: famines do not occur merely from a decline in food availability (FAD). Rather, they are caused by inequalities built into mechanisms for distributing food, which he called “entitlement failures.” He noted that in many historical famines, food supplies were actually exported from famine areas, and that no functioning democracy with a free press has ever suffered a major famine.
3. The Capability Approach
Collaborating with philosopher Martha Nussbaum, Sen developed the Capability Approach. He argued that poverty and human development should not be measured solely by income or GDP. Instead, development should be evaluated by the substantive freedoms and “capabilities” people have to lead lives they value (e.g., the capability to be well-nourished, to be educated, to participate in community decisions, and to live a long, healthy life).
This theory served as the direct conceptual foundation for the Human Development Index (HDI), co-created by Sen and Pakistani economist Mahbub ul Haq and published annually by the United Nations Development Programme (UNDP).
Legacy and Philosophy
Sen’s writings have had a massive impact on international development policies and welfare programs worldwide. He remains an active public intellectual, writing frequently on social justice, democratic tolerance, and political freedom.