“The Remorseful,” C. M. Kornbluth, 1953 – Humanity has destroyed itself through war. A man wanders the world, apparently the last survivor. An alien insect-composite being with no individual “self” arrives and tries to communicate with him.
Comments: Read in Star Science Fiction Stories No. 2.
Author: Wikipedia: “Cyril M. Kornbluth (July 2, 1923 – March 21, 1958) was an American science fiction author and a notable member of the Futurians.” Interested readers: “Re-reading Kornbluth” by Robert Silverberg. See also James Sallis’s review of C. M. Kornbluth: The Life and Works of a Science Fiction Visionary (2010) in The Magazine of Fantasy and Science Fiction.