Who Was Abdus Salam?

1. A brilliant boy from Jhang

Mohammad Abdus Salam was born on 29 January 1926 in Jhang, a town in the Punjab of British India, now in Pakistan. He was the eldest of seven brothers and two sisters, and his father was a teacher and an official in the Department of Education. The family belonged to the Ahmadiyya community, a faith Salam held throughout his life and which would later shape his relationship with the Pakistani state in painful ways. As a schoolboy he showed extraordinary ability in mathematics, winning a scholarship to Government College Lahore, where he took a double first in mathematics and English literature, and then to St John's College, Cambridge.

At Cambridge, Salam took a double first in mathematics and physics, graduating with a BA in 1949, won the Smith's Prize in 1950 for the most outstanding pre-doctoral contribution to physics, and received his PhD in theoretical physics from the Cavendish Laboratory in 1952, for work in quantum electrodynamics. These were the highest honours a young physicist could win, and they marked him as one of the most gifted theorists of his generation. His teachers included some of the leading physicists of the day, and his doctoral work was already being noticed for its originality and mathematical power.

There is a point worth pausing on. Salam came from a small town in the Punjab, from a family of modest means, and he reached the top of world physics through scholarships and public education. His career is often presented as a story of individual genius, and it was, but it was also a story of institutions: a government college, a Cambridge scholarship, a research laboratory that welcomed a colonial subject as an equal. He never forgot that, and it explains the second half of his life, in which he spent as much energy building institutions for others as he did on his own research. The boy who needed a scholarship became the man who built scholarships for others.

2. The electroweak idea: unifying two forces

Salam's scientific achievement was to show that the electromagnetic force, which governs light, electricity and magnetism, and the weak nuclear force, which governs radioactive decay, are different faces of a single electroweak interaction. The idea had been explored by others, notably Sheldon Glashow, but Salam developed it in the 1960s and presented his version in 1968, in a lecture at a Nobel symposium in Gothenburg. The theory predicted the existence of the weak neutral current, a new kind of interaction, and it predicted the masses of the W and Z particles that carry the weak force.

The prediction was confirmed in stages. In 1973, the Gargamelle bubble chamber experiment at CERN observed the weak neutral current, and in 1983 CERN's proton-antiproton collider discovered the W and Z particles with masses close to those the theory predicted. These confirmations turned electroweak theory from a mathematical proposal into the accepted description of two of nature's forces, and they became a central part of the Standard Model of particle physics, the framework that describes all known particles and forces except gravity. In 1979 Salam shared the Nobel Prize in Physics with Sheldon Glashow and Steven Weinberg for this work.

It is worth understanding what unification means here, because it is the heart of Salam's science. Physicists had long suspected that forces that look different at ordinary energies might be the same force seen in different conditions, just as electricity and magnetism turned out to be one electromagnetic force in the nineteenth century. Salam's work extended that idea to the weak force, showing that at very high energies the electromagnetic and weak forces merge. The achievement was mathematical and conceptual rather than experimental: Salam did not build the machines that confirmed the theory, but he gave the machines something to look for. That division of labour, between theorists who predict and experimentalists who confirm, is how modern physics works, and Salam was one of its finest theorists.

3. Building science in Pakistan

After his PhD, Salam returned to Pakistan and taught mathematics at Government College Lahore and the University of the Punjab from 1951 to 1954, becoming head of the mathematics department. He found a country with almost no research infrastructure: few laboratories, few journals, and little money for science. He returned to England in 1954, becoming a lecturer at Cambridge and then, in 1957, Professor of Theoretical Physics at Imperial College London, where he built a leading theoretical physics group and remained for the rest of his career. But he did not abandon Pakistan. From London, he became the chief scientific adviser to the government of Pakistan, and he used that position to found institutions.

His most important Pakistani creation was the Pakistan Atomic Energy Commission, which he helped establish, and the Pakistan Institute of Nuclear Science and Technology, known as PINSTECH, which trained the country's first generation of nuclear scientists. He also helped found the Space and Upper Atmosphere Research Commission, SUPARCO, and he advised on the establishment of universities and research councils. His vision was of a Pakistan that could do its own science rather than importing it, and for a time, in the 1960s, that vision seemed to be working: Pakistani physicists were publishing internationally, and the country had a scientific establishment where none had existed.

The limits of that vision became clear in the 1970s. Salam had always insisted that science should be peaceful, and he opposed the development of nuclear weapons. After India's nuclear test in 1974, Pakistan's government moved towards a weapons programme, and Salam, who had been involved in the early nuclear programme, distanced himself from it. The exact nature of his role in Pakistan's nuclear history is debated: some accounts say he laid the foundations that others later used for weapons, while others stress that he left the programme when it turned towards weapons and that he opposed it. What is not debated is that he believed science should serve development and peace, and that he said so publicly, at a cost to his influence in Islamabad.

4. The ICTP: science for the developing world

Salam's most lasting institutional achievement was not in Pakistan but in Trieste, Italy. In 1964 he founded the International Centre for Theoretical Physics, the ICTP, with support from the International Atomic Energy Agency and UNESCO. His idea was simple and radical: physicists from developing countries, who were isolated from the centres of research, needed a place where they could visit, meet colleagues, use a library, attend lectures and do research, and then return home. The ICTP offered associate memberships, training courses and research visits, and it became a lifeline for scientists from Asia, Africa and Latin America who could not afford long stays in Europe or America.

The centre worked because Salam understood the problem from the inside. He had been a physicist from a developing country himself, and he knew that isolation, not lack of talent, was the main barrier. The ICTP did not try to replace universities in the developing world; it tried to connect them to the world. Over the decades it has hosted tens of thousands of scientists, and its model has been copied by other centres. In 1997, a year after his death, it was renamed the Abdus Salam International Centre for Theoretical Physics in his honour, and it continues to operate in Trieste today.

This work is the part of Salam's legacy that is least disputed and most widely admired. Physicists who never met him speak of the ICTP as the place where their careers began, and the centre's alumni include scientists from more than a hundred countries. It is also the part of his legacy that best expresses his philosophy: that science is a common human enterprise, that talent is distributed evenly around the world while opportunity is not, and that the job of a successful scientist is to narrow that gap. Compared with Albert Einstein, who changed physics with ideas, and Marie Curie, who changed it with experiments, Salam changed it with institutions, and institutions, unlike papers, go on working after their founder is gone.

5. Faith, the 1974 amendment and the break with Pakistan

Salam belonged to the Ahmadiyya community, a Muslim movement founded in the nineteenth century whose members believe that Mirza Ghulam Ahmad was the promised messiah. Mainstream Muslim scholars regard that belief as incompatible with the doctrine that Muhammad was the final prophet, and in Pakistan the Ahmadiyya community has faced legal discrimination and violence. In 1974, after riots against Ahmadis, Pakistan's parliament amended the constitution to declare Ahmadis non-Muslims. Salam, who was then the government's chief scientific adviser, resigned in protest, and he never again held a government position in Pakistan.

The break was painful and public. Salam had given years of his life to building Pakistan's science, and the state he had served declared his faith outside Islam. He continued to visit Pakistan and to support its scientists, but the relationship was never repaired. In 1984, a further ordinance made it a criminal offence for Ahmadis to call themselves Muslims or to use Islamic terms, and Salam's position became harder still. He did not hide his faith, and he did not renounce it, and that refusal cost him honours and recognition in his own country that were freely given abroad.

The controversy continues after his death. When Salam died in Oxford on 21 November 1996, aged 70, after a long illness, he was buried in Rabwah, the Ahmadiyya community's town in Pakistan, and his gravestone originally read 'First Muslim Nobel Laureate'. Local authorities later removed the word Muslim, leaving a gap in the stone that has become, for many, a symbol of his contested status in Pakistan. Supporters say the removal was an act of sectarian erasure against a national hero; those who defend it say the law required it. What is certain is that Pakistan has never fully claimed its only science Nobel laureate, and that failure is itself part of his story. In 2023 Imperial College London renamed its main library the Abdus Salam Library, an honour that came from Britain, not from Pakistan.

6. Why he matters: theory, institutions and the Third World

Salam's importance has three parts, and each one matters for a different reason. The first is the science: electroweak unification is one of the great achievements of twentieth-century physics, and it earned him a share of the Nobel Prize. The second is the institutions: the ICTP, PINSTECH, SUPARCO and the Pakistan Atomic Energy Commission were built by his effort and his persuasion, and they outlived him. The third is the example: he showed that a scientist from a poor country could reach the highest level of world science and then use that position to open doors for others, rather than simply enjoying it himself.

That example is why Salam is studied in the developing world in a way that few other physicists are. A. P. J. Abdul Kalam, the Indian scientist and president, admired Salam's combination of science and institution-building, and the two men shared a belief that science should serve national development. Stephen Hawking, who worked in the same Cambridge tradition, represented a different model: a theorist whose fame came from ideas alone. Salam's fame came from ideas plus institutions, and that combination is rarer and, in some ways, more useful. Ideas change physics; institutions change who gets to do physics.

There is also a harder lesson in his life. Salam believed that science could transcend politics and religion, and for much of his career it did: his physics was judged by physicists of every faith and none, and his ICTP welcomed scientists from countries that were enemies of each other. But in Pakistan, politics and religion caught up with him, and the state he served rejected him for his faith. His life therefore raises a question that has no easy answer: how far can science protect a scientist from the politics of his own country? Salam's answer, in practice, was that it could not, and that the scientist must then choose between his faith and his position. He chose his faith, and he paid for it with his standing at home.

7. Legacy and what to read next

Salam's legacy is secure in physics and in the developing world, and contested in Pakistan. The electroweak theory he helped build is now textbook physics, taught to every student of particle physics, and the W and Z particles it predicted are among the best-measured particles known. The ICTP continues to train physicists from developing countries, and its alumni network is one of the largest in science. In Pakistan, his name is given to a national science prize and to a centre for physics, but his faith is rarely mentioned in official accounts, and school textbooks have been criticised for omitting him. The gap between his international standing and his domestic recognition is itself a measure of the problem he spent his life fighting: that talent is not enough, and that institutions, including the state, decide who is honoured.

For readers who want to go further, the best starting points are the Nobel Prize website, which gives the citation and his own account of the work, and the ICTP's own history, which explains the centre he founded. His collected papers and his lectures on the unity of physics are the most direct way to understand his thinking, and several biographies trace the full arc of his life, from Jhang to Cambridge to Trieste. The biography on this site gives the verified facts of his life; the deeper story is the one his life tells about science itself, that it is a human activity, carried on by people with faiths and countries and loyalties, and that its greatest achievements are often made by people who refuse to choose between their science and their conscience. Salam refused that choice, and his life is the record of what that refusal cost and what it built.

Frequently asked questions

Sources and further reading

• NobelPrize.org — Abdus Salam, facts and prize motivation
• NobelPrize.org — Abdus Salam, curriculum vitae
• Wikipedia — Abdus Salam
• Abdus Salam International Centre for Theoretical Physics — Salam timeline

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• Who Was Charles Darwin? — Charles Darwin's theory of evolution by natural selection, published in On the Origin of Species in 1859, became the foundation of modern biology.
• Who Was Charles Dickens? — Charles Dickens was the greatest novelist of the Victorian era, whose serialised novels mixed comedy, social criticism and unforgettable characters.
• Who Was Charlie Chaplin? — Charlie Chaplin created the Little Tramp, the most famous screen character of the silent era, and directed classics City Lights and The Great Dictator.
• Who Was Cleopatra? — Cleopatra VII was the last ruler of Ptolemaic Egypt, a multilingual stateswoman who kept her kingdom independent for 21 years before Rome annexed it.
• Who Was Diego Maradona? — Diego Maradona was an Argentine footballer who captained Argentina to the 1986 World Cup and is widely regarded as one of the greatest players in history.
• Who Was Don Bradman? — Don Bradman was an Australian cricketer who averaged 99.94 in Test cricket, a record so far ahead of any other batsman that it remains famous in sport.
• Who Was Elvis Presley? — Elvis Presley took gospel, country and rhythm and blues and turned them into rock and roll, becoming the most famous singer of his century.
• Who Was Emily Dickinson? — Emily Dickinson was an American poet who wrote nearly 1,800 poems in private in Amherst, Massachusetts, and was barely published in her lifetime.
• Who Was Faiz Ahmed Faiz? — Faiz Ahmed Faiz was Pakistan's most celebrated modern Urdu poet, whose verse joined romantic lyricism with resistance to injustice.
• Who Was Franz Beckenbauer? — Franz Beckenbauer was a German footballer known as Der Kaiser, who won the World Cup as captain in 1974 and as manager in 1990.
• Who Was Freddie Mercury? — Freddie Mercury was the lead singer of Queen, a four-octave voice and fearless showman who wrote Bohemian Rhapsody and We Are the Champions.
• Who Was Frida Kahlo? — Frida Kahlo was a Mexican painter known for uncompromising, brilliantly coloured self-portraits exploring identity, the body and death.
• Who Was Galileo Galilei? — Galileo Galilei reshaped astronomy with his telescopic discoveries of 1610, defended a Sun-centred universe, and was tried by the Inquisition in 1633.
• Who Was Genghis Khan? — Genghis Khan united the Mongol tribes and built the largest contiguous land empire in history, a conqueror and lawgiver whose legacy is still argued over.
• Who Was George Washington? — George Washington won American independence, presided over the Constitutional Convention, and as first president defined the office — then walked away.
• Who Was Guglielmo Marconi? — Guglielmo Marconi was an Italian inventor who built the first practical wireless telegraph and sent the first transatlantic radio signal in 1901.
• Who Was Henry Ford? — Henry Ford was an American industrialist who founded the Ford Motor Company, built the Model T and perfected the moving assembly line.
• Who Was Isaac Newton? — Isaac Newton wrote the laws of motion and universal gravitation, invented calculus and transformed optics, leaving a lasting legacy in science.
• Who Was James Watt? — James Watt did not invent the steam engine, but his separate condenser of 1765 made it efficient enough to power the Industrial Revolution.
• Who Was Jane Austen? — Jane Austen published six novels in her lifetime, anonymously, and died at 41. This explains her life, her novels, her irony and her growing reputation.
• Who Was Jesus Christ? — Jesus of Nazareth is the central figure of Christianity, the world's largest religion. This explains his life in the Gospels, his teachings and his legacy.
• Who Was Johan Cruyff? — Johan Cruyff was the star of Total Football, won three Ballon d'Or awards, and as a manager built the Barcelona team that shaped modern football.
• Who Was Johannes Gutenberg? — Johannes Gutenberg built the first mechanised printing press in Europe and printed the Gutenberg Bible around 1455, changing how the world shared ideas.
• Who Was John Keats? — John Keats died of tuberculosis in Rome at 25, having written his six great odes in a single year. This explains his short life, his poetry and his fame.
• Who Was Joseph Stalin? — Joseph Stalin led the Soviet Union from the 1920s until 1953, industrialised the country and led it through the Second World War, ruling through terror.
• Who Was Julius Caesar? — Julius Caesar conquered Gaul, crossed the Rubicon and remade Rome's calendar and government, and was murdered by senators who feared he would be king.
• Who Was Kobe Bryant? — Kobe Bryant won five NBA championships with the Los Angeles Lakers and became known for the Mamba Mentality, on and off the court.
• Who Was Leo Tolstoy? — Leo Tolstoy wrote War and Peace and Anna Karenina, then abandoned literary fame for a radical moral philosophy that influenced Gandhi and the world.
• Who Was Leonardo da Vinci? — Leonardo da Vinci painted the Mona Lisa and The Last Supper and filled notebooks with anatomy and engineering, becoming the symbol of the Renaissance.
• Who Was Ludwig van Beethoven? — Ludwig van Beethoven wrote nine symphonies, 32 piano sonatas and the Missa Solemnis, much of it while deaf. This explains his life and legacy.
• Who Was Mahatma Gandhi? — Mahatma Gandhi led India to independence through nonviolent resistance, and his ideas shaped civil-rights movements worldwide.
• Who Was Mao Zedong? — Mao Zedong founded the People's Republic of China in 1949 and led it until 1976, bringing unification and the Great Leap Forward and Cultural Revolution.
• Who Was Margaret Thatcher? — Margaret Thatcher was the first woman to serve as British prime minister, leading the UK from 1979 to 1990 through reform, the Falklands War and division.
• Who Was Marie Curie? — Marie Curie discovered polonium and radium and remains the only person to win Nobel Prizes in two different sciences, a pioneer of radioactivity research.
• Who Was Marilyn Monroe? — Marilyn Monroe was the biggest star of the 1950s, the blonde bombshell of Gentlemen Prefer Blondes and Some Like It Hot, who fought the studio system.
• Who Was Mark Twain? — Mark Twain, born Samuel Langhorne Clemens, wrote Tom Sawyer and Huckleberry Finn and became America's most famous humorist.
• Who Was Maya Angelou? — Maya Angelou was a poet, memoirist and civil rights activist whose autobiography I Know Why the Caged Bird Sings made her widely read.
• Who Was Michael Jackson? — Michael Jackson, the King of Pop, made Thriller, the best-selling album in history, and changed music video, dance and pop stardom.
• Who Was Mirza Ghalib? — Mirza Ghalib (1797-1869) is the pre-eminent Urdu and Persian poet of the last Mughal era, whose ghazals on love, loss and doubt are still recited.
• Who Was Muhammad Ali Jinnah? — Muhammad Ali Jinnah was the barrister and statesman who led the All-India Muslim League and became Pakistan's first Governor-General in 1947.
• Who Was Muhammad Ali? — Muhammad Ali was the three-time heavyweight champion who called himself The Greatest, and the most famous athlete of the twentieth century.
• Who Was Napoleon Bonaparte? — Napoleon Bonaparte rose from Corsica to Emperor of the French, redrew the map of Europe, and left a legal code that still shapes law across the world.
• Who Was Nelson Mandela? — Nelson Mandela spent 27 years in prison under apartheid, then became South Africa's first democratically elected president and a Nobel Peace laureate.
• Who Was Nikola Tesla? — Nikola Tesla developed the alternating-current power system, the induction motor and the Tesla coil, making long-distance electric power practical.
• Who Was Osama bin Laden? — Osama bin Laden founded al-Qaeda in 1988 and organised the September 11, 2001 attacks, in which nearly 3,000 people were killed.
• Who Was Pablo Neruda? — Pablo Neruda was Chile's great poet, a Nobel laureate, a communist senator and a diplomat. This explains his poetry, his politics and his death.
• Who Was Pablo Picasso? — Pablo Picasso co-founded Cubism, painted Guernica, and spent 75 years breaking the rules of art — the most influential artist of the twentieth century.
• Who Was Pelé? — Pele is the only footballer to win three World Cups, the youngest winner, and the game's first global icon. This is his life, his goals and his legacy.
• Who Was Pope Francis? The People's Pope — Pope Francis, the first pope from the Americas and the first Jesuit pope, led the Catholic Church from 2013 to 2025 with an emphasis on mercy and the poor.
• Who Was Prophet Muhammad? — The Prophet Muhammad is the founder of Islam, the world's second-largest religion. This explains his life, his teachings and his legacy.
• Who Was Queen Elizabeth II? — Queen Elizabeth II reigned for 70 years, from 1952 to 2022 — the longest reign in British history. This explains her life, her reign and her legacy.
• Who Was Rabindranath Tagore? — Rabindranath Tagore was the first non-European to win the Nobel Prize in Literature, and the author of the national anthems of India and Bangladesh.
• Who Was Rosa Parks? — Rosa Parks was not a tired seamstress who acted on impulse. She was a trained activist and NAACP secretary whose bus refusal was a deliberate act.
• Who Was Rosalind Franklin? — Rosalind Franklin's X-ray image, Photograph 51, gave Watson and Crick the key evidence for the double helix. This is her life and the credit debate.
• Who Was Rumi? — Rumi, the thirteenth-century Persian poet of Konya, wrote the Masnavi and the Divan-e Shams, and became the most widely read poet in the world.
• Who Was Shane Warne? — Shane Warne took 708 Test wickets, bowled the Ball of the Century in 1993 and won the 1999 World Cup with Australia. This explains his career.
• Who Was Stephen Hawking? — Stephen Hawking was a theoretical physicist who showed that black holes emit radiation and wrote A Brief History of Time. He died in 2018, aged 76.
• Who Was Steve Jobs? — Steve Jobs co-founded Apple in 1976, was forced out in 1985, built Pixar, and returned to launch the iMac, iPod, iPhone and iPad. He died in 2011, aged 56.
• Who Was Thomas Edison? — Thomas Edison held 1,093 US patents, invented the phonograph and the practical incandescent lamp, and built the first commercial electric power system.
• Who Was Vincent van Gogh? — Vincent van Gogh produced about 2,100 artworks in a single decade, including The Starry Night and Sunflowers, and became famous only after his death at 37.
• Who Was William Shakespeare? — William Shakespeare is the most performed playwright in history, yet almost nothing is reliably known about his private life.
• Who Was William Wordsworth? — William Wordsworth launched English Romanticism with Lyrical Ballads and wrote The Prelude, the great autobiographical poem. This explains his life.
• Who Was Winston Churchill? — Winston Churchill led Britain through the Second World War and won the Nobel Prize in Literature, and his record on empire is still debated.
• Who Was Wolfgang Amadeus Mozart? — Wolfgang Amadeus Mozart was a child prodigy who composed more than 600 works before his death at 35, defining the Classical era.
• Why Van Gogh Became Famous After Death — Vincent van Gogh died in 1890 almost unknown, and within a few decades his paintings were among the most loved in the world.