Thinkers Timeline

B.R. Ambedkar (1891-1956) was an Indian jurist, economist, social reformer, and philosopher. His full name was Bhimrao Ramji Ambedkar. He was born into a Dalit family, the community then called Untouchables, who occupied the lowest position in India's caste hierarchy and were subjected to severe discrimination, exclusion, and violence. Despite the enormous obstacles placed in front of him by the caste system, Ambedkar became one of the most educated people in India of his generation, earning doctorates from Columbia University in New York and the London School of Economics. He spent his life fighting against caste as a system of oppression and arguing for the full rights and dignity of Dalit people. He was the chief architect of the Indian Constitution, which he designed to protect the rights of all citizens and to prohibit caste discrimination. In the last year of his life, he converted to Buddhism along with hundreds of thousands of his followers, an act he understood as both a spiritual choice and a rejection of the Hindu caste system. He died in 1956, just weeks after completing his final manuscript.

Ravi Shankar was an Indian musician. He played the sitar, a long-necked string instrument from northern India. He is the most famous Indian classical musician of the 20th century. He was born in 1920 in the city of Varanasi (also called Banaras), in northern India. He came from a Bengali Brahmin family. His father was a lawyer and scholar who left the family when Ravi was young. His older brother Uday Shankar was a famous dancer who toured the world with an Indian dance company. As a boy, Ravi joined his brother's troupe. He travelled across Europe and America as a young dancer and musician. He met many Western artists in this period. At 18, he made a serious decision. He left his brother's company and went to study music seriously with a great teacher named Allauddin Khan in central India. He spent seven years in Khan's home, training intensively in the strict Indian classical tradition. This kind of long apprenticeship was traditional. The teacher was almost a parent. Ravi later married Khan's daughter, Annapurna Devi, who was also a brilliant musician. From the 1950s onwards, his career grew rapidly. He performed across India, then in Europe and America. In the 1960s he became famous in the West, partly because of his friendship with George Harrison of the Beatles. He continued performing into his nineties. He had a complex personal life, with several partners and four children, including the musicians Anoushka Shankar and Norah Jones. He died in San Diego in 2012, aged 92.

Coimbatore Krishnarao Prahalad (1941-2010) was an Indian-American management scholar whose ideas about corporate strategy, core competence, and the business opportunity at the bottom of the pyramid transformed how companies and development thinkers approached both strategy and poverty. He was born in Coimbatore, in Tamil Nadu, the son of a judge and a civil servant. He studied physics at Loyola College, Madras, and worked for four years in an Indian branch of Union Carbide, the American chemical company, before entering the Indian Institute of Management in Ahmedabad. In 1972 he travelled to the United States for doctoral work at Harvard Business School, completing his thesis in 1975. He joined the faculty of the University of Michigan's Ross School of Business in 1977 and remained there for the rest of his career. His 1990 Harvard Business Review article with Gary Hamel, The Core Competence of the Corporation, became one of the most-cited business articles ever written and reshaped strategic thinking through the 1990s. His later work took him in a different direction. His 2002 article and 2004 book The Fortune at the Bottom of the Pyramid argued that the world's poorest four billion people represented not only a moral claim on international attention but also a significant market that could be served profitably if products and business models were designed appropriately. The book reached business schools, development agencies, and corporations. He continued publishing influential work until his death, wrote regularly for Indian newspapers on the country's development, and mentored a generation of scholars and practitioners. He died in San Diego in 2010 at the age of sixty-eight.

Vandana Shiva (born 1952) is an Indian physicist, environmental activist, and philosopher. She was born in Dehradun in the foothills of the Himalayas, into a family with deep connections to forests and farming. She studied physics at university and completed a doctorate in the philosophy of science at the University of Western Ontario in Canada. She then returned to India and made a decision that changed the direction of her life: she left academic science to work with the Chipko movement, a grassroots movement in which Indian village women embraced trees to prevent them being cut down by commercial loggers. This experience convinced her that the most important environmental battles were being fought not in laboratories or conference rooms but in the fields and forests where ordinary people, particularly women, lived and worked. She founded the Research Foundation for Science, Technology and Ecology and later Navdanya, an organisation that works to protect seed diversity and support small farmers. She has received the Alternative Nobel Prize and many other awards and is one of the most recognised voices in global debates about food, farming, and the natural world.

Indra Krishnamurthy Nooyi (born 1955) is an Indian-American businesswoman and former chief executive of PepsiCo, one of the world's largest food and beverage companies. She was born in Madras (now Chennai) to a Tamil Brahmin family and grew up in a middle-class household where education was valued intensely. Her mother regularly asked her daughters at dinner to explain what they would do as president or prime minister, a practice Nooyi later credited with shaping her ambition. She studied physics, chemistry, and mathematics at Madras Christian College, earned an MBA from the Indian Institute of Management in Calcutta, and won a scholarship to Yale School of Management, where she completed a second master's degree in 1980. She worked at the Boston Consulting Group, Motorola, and Asea Brown Boveri before joining PepsiCo in 1994. She rose through corporate strategy and finance roles, led the spin-off of PepsiCo's restaurant businesses (Pizza Hut, KFC, Taco Bell) into Yum Brands, and led the acquisition of Tropicana and Quaker Oats. She became chief financial officer in 2001, president and CFO in 2006, and chief executive officer and chairman in 2006 — the first woman of colour to lead a Fortune 50 company. During her twelve years as CEO, PepsiCo's revenue grew from forty-four to sixty-four billion dollars. She led a strategic reorientation she called Performance with Purpose, shifting the company's portfolio toward healthier products while maintaining profitability. She retired as CEO in 2018 and as chairman in 2019. She has since served on the boards of Amazon, the International Cricket Council, and the World Economic Forum, co-led a New York State commission on reopening during the Covid pandemic, and published her 2021 memoir My Life in Full. She lives in Connecticut with her husband, Raj, and their two daughters.