Which organization did C.S. Lewis chair at Oxford from 1942?

C.S. Lewis chaired the Socratic Club at Oxford from 1942.

The Socratic Club was founded at Oxford University in 1941 by Stella Aldwinckle, a Christian student and organizer. Lewis became its president, commonly described as its chairman, in 1942. The club held evening discussions in which Christian and non-Christian speakers examined questions about religion, philosophy, and evidence.

The club’s name reflected its emphasis on questioning and argument rather than on one-sided lectures. Lewis’s participation helped make its meetings prominent in Oxford intellectual life, and the club hosted debates involving figures such as philosopher J.B. Wilson and atheist philosopher Elizabeth Anscombe. Lewis later described his 1948 debate with Anscombe as influential, although accounts differ about exactly how it affected his writing. The Socratic Club should not be confused with the Inklings, which was an informal literary discussion group.