Cycles - essay by uncredited
Chalice of Death - novella by Robert Silverberg
Orphan of the Void - novelette by Lloyd Biggle, Jr. (variant of The Man Who Wasn't Home 1960)
Down to the Worlds of Men - novelette by Alexei Panshin
Governance - essay by uncredited
Ministry of Disturbance - novelette by H. Beam Piper
Blind Alley - short story by Isaac Asimov
A Planet Named Shayol - novelette by Cordwainer Smith
Concerns - essay by uncredited
Diabologic - short story by Eric Frank Russell
Fighting Philosopher - novelette by Everett B. Cole [as by E. B. Cole]
Honorable Enemies - novelette by Poul Anderson
