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Karl Popper

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Karl Popper in the 1980's.

Sir Karl Raimund Popper (28 July 1902 – 17 September 1994) was an Austrian–British philosopher, academic and social commentator. He was one of the most important philosophers of science of the 20th century.

Popper bust in the Arkadenhof of the University of Vienna

Popper changed how people think about science. He said that scientific ideas can’t be proven true, but they can be tested and shown to be wrong. He believed a good scientific idea should be able to be tested and possibly proven false. He called this “falsifiability.” Popper also started the Department of Philosophy at the London School of Economics and Political Science.

Popper supported liberal democracy and open societies. He spoke out against unfair governments and believed that liberal democracies were the best way to build a free and open society where people could share ideas fairly.

Life and career

Karl Popper was born in Vienna in 1902. His family loved books and learning. Popper studied many subjects at the University of Vienna, like mathematics and philosophy.

English Heritage blue plaque at Burlington Rise, Oakleigh Park, London

Popper worked briefly in street construction but it was too difficult. He then trained as a cabinetmaker and later worked with children. In 1928, he earned a doctorate in psychology. He became a teacher of mathematics and physics and married Josefine Anna Henninger in 1930.

In 1937, Popper moved to New Zealand where he taught philosophy. After World War II, he moved to the United Kingdom and joined the London School of Economics. He became famous for his ideas about how science should work. He said that scientific ideas should be tested and could be proven wrong.

Popper married Josefine and they did not have children. He kept working on his philosophy until he became very ill and passed away in 1994 at the age of 92. His books and papers are kept in libraries for people to study.

Honours and awards

Popper with Professor Cyril Höschl, while receiving an honorary doctorate from Charles University in Prague in May 1994

Karl Popper received many awards for his work. He was given the Lippincott Award by the American Political Science Association and the Sonning Prize. He also received the Otto Hahn Peace Medal and became a member of important groups such as the Royal Society, the British Academy, the London School of Economics, and King's College London.

Popper was knighted by Queen Elizabeth II in 1965. He received many other prizes, including the City of Vienna Prize for the Humanities, the Austrian Decoration for Science and Art, and the Kyoto Prize in Arts and Philosophy in 1992. These awards recognized his contributions to philosophy.

Philosophy

Popper lived during a time when strong beliefs sometimes led to harmful actions. He saw groups trying to take control by force, which made him careful about how we use ideas.

He believed that real science isn’t about proving ideas right. Instead, it’s about trying to prove them wrong. If an idea can’t be tested or challenged, it isn’t truly scientific. He thought this testing helped science grow and improve.

Influence

Karl Popper helped make the study of science important in philosophy. He started the Department of Philosophy at the London School of Economics, where he taught many students who later became famous philosophers.

Popper was good friends with other important thinkers, like economist Friedrich Hayek. They respected each other’s work. Popper also influenced artists, scientists, and lawyers with his ideas about learning from mistakes.

One of Popper’s students became a successful investor named George Soros. Soros used Popper’s ideas to help create organizations that support open and free societies.

Published works

You can find a full list of Karl Popper’s writings on the website of the Karl Popper Archives at the University of Klagenfurt.

Some of his most famous books include:

These books talk about how science works, society, and knowledge. Many of them have been published in different editions over the years.

Filmography

In 1988, Karl Popper was in a video called Interview Karl Popper made by the Open Universiteit.

Images

Karl Popper's grave in Lainzer Friedhof, Vienna, Austria.
A classical bust of the ancient Greek philosopher Socrates.

Related articles

This article is a child-friendly adaptation of the Wikipedia article on Karl Popper, available under CC BY-SA 4.0.

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