xi Preface (Science Fiction of the 50's) (1979) essay by Frederik Pohl xv Introduction (Science Fiction of the Fifties) (1979) essay by Joseph D. Olander and Martin H. Greenberg [as by Joseph D. Olander and Martin Harry Greenberg ] 1 Spectator Sport (1950) shortstory by John D. MacDonald 9 Feedback (1951) shortstory by Katherine MacLean 31 Bettyann [Bettyann 1] (1951) novelette by Kris Neville 80 Dark Interlude (1951) shortstory by Fredric Brown and Mack Reynolds 90 What Have I Done? (1952) shortstory by Mark Clifton 111 DP! (1953) shortstory by Jack Vance 134 The Liberation of Earth (1953) shortstory by William Tenn 156 A Bad Day for Sales (1953) shortstory by Fritz Leiber 164 Saucer of Loneliness (1953) shortstory by Theodore Sturgeon (variant of A Saucer of Loneliness) 181 Heirs Apparent (1954) novelette by Robert Abernathy 208 5,271,009 (1954) novelette by Alfred Bester 249 Short in the Chest (1954) shortstory by Margaret St. Clair 260 The Academy (1954) novelette by Robert Sheckley 287 Nobody Bothers Gus [Gus] (1955) shortstory by Algis Budrys 304 Happy Birthday, Dear Jesus (1956) novelette by Frederik Pohl 331 A Work of Art (1956) novelette by James Blish 351 The Country of the Kind (1956) shortstory by Damon Knight 368 The Education of Tigress McCardle (1957) shortstory by C. M. Kornbluth (variant of The Education of Tigress Macardle) 380 The Cage (1957) shortstory by A. Bertram Chandler 394 The Last of the Deliverers (1958) shortstory by Poul Anderson 410 Adrift on the Policy Level (1959) shortstory by Chan Davis 432 Love O Careless Love (1979) essay by Barry N. Malzberg 436 Selected Bibliography (1979) essay by uncredited