Retrograde Evolution

by Clifford D. Simak

Among the many aliens, there is one race that, over its centuries-old existence, regularly and briefly descends into barbarism. But their behavior looks like degradation only to an outside observer.

Unknown Binding

Published January 1, 1953

About the author

"He was honored by fans with three Hugo awards and by colleagues with one Nebula award and was named the third Grand Master by the Science Fiction and Fantasy Writers of America (SFWA) in 1977." (Wikipedia)

See http://en.wikipedia.org/wiki/Clifford...