Which literary society included J.R.R. Tolkien and C.S. Lewis at Oxford?

The literary society that included J.R.R. Tolkien and C.S. Lewis at Oxford was The Inklings.

The Inklings were an informal Oxford discussion group whose members met to read and discuss works in progress, literature, religion, and ideas. The group was active mainly during the 1930s and 1940s and met at locations including Lewis’s rooms at Magdalen College and the Eagle and Child pub.

Tolkien and Lewis became close friends, although their relationship included disagreement and changed over time. Tolkien read portions of his developing fiction to the group, while Lewis shared his own imaginative and theological writing.

The Inklings were not a formal university department or an organization with a fixed membership list. Their name referred to a circle of writers and academics rather than a publishing company. Other associated members included Charles Williams, Owen Barfield, and Warren Lewis, C.S. Lewis’s brother.