Seymour Aubrey Papert (29 February 1928 – 31 July 2016) was a South African-born American mathematician, computer scientist, and educator, who spent most of his career teaching and researching at the Massachusetts Institute of Technology. He was born in Pretoria, Union of South Africa, and died in Blue Hill, Maine, U.S. Working across mathematics, computer science, cognitive science, and education, he was one of the pioneers of artificial intelligence and of the constructionist movement in education.^[43] Alongside Wally Feurzeig and Cynthia Solomon, Papert co-invented the Logo programming language, and he is also known for his work on Perceptrons, One Laptop per Child, and Papert's principle.^{[7,45,46,47,48]}

Papert earned a BA and a PhD from the University of the Witwatersrand—submitting his thesis "Sequential Convergence in Lattices with Special Reference To Modular and Subgroup Lattices" in 1952—and a second PhD in 1960 from the University of Cambridge with the thesis "The Lattices of Logic and Topology" under advisor Frank Smithies.^[41] In addition to MIT, his institutional affiliations included the University of Geneva, the University of Paris, and the National Physical Laboratory. His doctoral students included Idit Harel Caperton, Carl Hewitt, Mitchel Resnick, Edwina Rissland, David Williamson Shaffer, Gerald Jay Sussman, and Terry Winograd. His spouses included Dona Strauss, Androula Henriques, Sherry Turkle, and Suzanne Massie, and his official website is papert.org.

Born to a Jewish family, Papert attended the University of the Witwatersrand, receiving a Bachelor of Arts degree in philosophy in 1949 followed by a PhD in mathematics in 1952.^[26] He then went on to receive a second doctorate, also in mathematics, at the University of Cambridge in 1959, supervised by Frank Smithies.^[4,50]

Papert worked as a researcher in a variety of places, including St. John's College, Cambridge, the Henri Poincaré Institute at the University of Paris, the University of Geneva, and the National Physical Laboratory in London before becoming a research associate at MIT in 1963.^[4,51] He held this position until 1967, when he became professor of applied math and was made co-director of the MIT Artificial Intelligence Laboratory by its founding director Professor Marvin Minsky, until 1981; he also served as Cecil and Ida Green professor of education at MIT from 1974 to 1981.^[4]

At MIT, Papert went on to create the Epistemology and Learning Research Group at the MIT Architecture Machine Group, which later became the MIT Media Lab.^[52] Here, he was the developer of a theory on learning called constructionism, built upon the work of Jean Piaget in constructivist learning theories. Papert had worked with Piaget at the University of Geneva from 1958 to 1963 and was one of Piaget's protégés; Piaget himself once said that "no one understands my ideas as well as Papert".^[54] Based on these theories of learning, Papert has rethought how schools should work.

Papert used Piaget's work in his development of the Logo programming language while at MIT. He created Logo as a tool to improve the way children think and solve problems. A small mobile robot called the "Logo Turtle" was developed, and children were shown how to use it to solve simple problems in an environment of play. Papert insisted that a simple language or program that children can learn, like Logo, can also have advanced functionality for expert users.^[42] A main purpose of the Logo Foundation research group is to strengthen the ability to learn knowledge.^[53]

As part of his work with technology, Papert has been a proponent of the Knowledge Machine. He was one of the principals for the One Laptop Per Child initiative to manufacture and distribute The Children's Machine in developing nations. Papert also collaborated with the construction toy manufacturer Lego on their Logo-programmable Lego Mindstorms robotics kits, which were named after his groundbreaking 1980 book.^[1,55] A curated archive of Papert's articles, speeches, and interviews may be found on a website dedicated to Papert at The Daily Papert.

Papert was a political and anti-apartheid activist during his student years in South Africa, and subsequently chose self exile.^[49] While living in London in the 1950s, he was a leading figure in the revolutionary socialist circle around Socialist Review.^[19]

Papert was married four times, first to Dona Strauss, and later to Androula Henriques.^[18] His third wife was MIT professor Sherry Turkle, with whom he wrote the influential paper "Epistemological Pluralism and the Revaluation of the Concrete".^[21] In his final 24 years, Papert was married to Suzanne Massie, a Russian scholar and author of Pavlovsk: The Life of a Russian Palace and Land of the Firebird.

On 5 December 2006, Papert (then aged 78) received a serious brain injury when struck by a motor scooter while crossing the street with colleague Uri Wilensky as they were both attending the 17th International Commission on Mathematical Instruction (ICMI) Study conference in Hanoi, Vietnam.^[57] He underwent emergency surgery to remove a blood clot at the French Hospital of Hanoi before being transferred in a complex operation by a Swiss Air Ambulance Bombardier Challenger Jet to Boston, Massachusetts, where he spent approximately four weeks in intensive care.^[22,56,58] He was moved to a hospital closer to his home in January 2007, but then developed sepsis which damaged a heart valve that was later replaced.

By 2008 he had returned home, could think and communicate clearly and walk "almost unaided", but still had "some complicated speech problems" and was in receipt of extensive rehabilitation support.^[60] His rehabilitation team used some of the very principles of experiential, hands-on learning that he had pioneered.^[15,30] Papert died at his home in Blue Hill, Maine, on 31 July 2016.

Papert's work has been used by other researchers in the fields of education and computer science. He influenced the work of Uri Wilensky in the design of NetLogo and collaborated with him on the study of knowledge restructurations, as well as the work of Andrea diSessa and the development of "dynaturtles". He also influenced Alan Kay and the Dynabook concept, and worked with Kay on various projects. Additionally, he influenced the research of Idit Harel Caperton, coauthoring articles and the book Constructionism, and chairing the advisory board of the company MaMaMedia. In 1981, Papert along with several others in the Logo group at MIT, started Logo Computer Systems Inc. (LCSI), of which he was board chair for over 20 years. Working with LCSI, Papert designed a number of award-winning programs, including LogoWriter and Lego/Logo (marketed as Lego Mindstorms).

Papert won a Guggenheim fellowship in 1980, a Marconi International fellowship in 1981, the Software Publishers Association Lifetime Achievement Award in 1994, and the Smithsonian Award from Computerworld in 1997.^[63,61] In 2016, Papert's alma mater, the University of the Witwatersrand, awarded him the degree of Doctor of Science in Engineering, honoris causa.^[66] Papert has been called by Marvin Minsky "the greatest of all living education theorists".^[64,62] MIT President L. Rafael Reif summarized Papert's lifetime of accomplishments: "With a mind of extraordinary range and creativity, Seymour Papert helped revolutionize at least three fields, from the study of how children make sense of the world, to the development of artificial intelligence, to the rich intersection of technology and learning. The stamp he left on MIT is profound. Today, as MIT continues to expand its reach and deepen its work in digital learning, I am particularly grateful for Seymour's groundbreaking vision, and we hope to build on his ideas to open doors to learners of all ages, around the world."

Papert's publications include Perceptrons, co-authored with Marvin Minsky and published by MIT Press in 1969 with an enlarged edition in 1988 (ISBN 0-262-63111-3), as well as Counter-free automata, co-authored with Robert McNaughton in 1971 (ISBN 0-262-13076-9). He authored Mindstorms: Children, Computers, and Powerful Ideas (1980, ISBN 0-465-04674-6) and co-edited Constructionism: research reports and essays 1985–1990 by the Epistemology and Learning Research Group, the Media Lab, Massachusetts Institute of Technology with I. Harel (published by Ablex Pub. Corp, Norwood, NJ, in 1991). His later works include The Children's Machine: Rethinking School in the Age of the Computer (1993, ISBN 0-465-01063-6) and The Connected Family: Bridging the Digital Generation Gap (1996, ISBN 1-56352-335-3).

The Daily Papert hosts the Seymour Papert Print Archives as well as the Seymour Papert Audio & Video Archives. Additional materials and information are available at papert.org.