Acknowledgements 7
Introduction 9
Sole Solution＆Eric Frank Russell 15
Lot＆Ward Moore 18
The Short-Short Story of Mankind＆John Steinbeck 51
Skirmish＆Clifford Simak 58
Poor Little Warrior!＆Brian W．Aldiss 82
Grandpa＆James H．Schmitz 90
The Half Pair＆Bertram Chandler 117
Command Performance＆Walter M．Miller 123
Nightfall＆Isaac Asimov 145
The Snowball Effect＆Katherine Maclean 180
The End of Summer＆Algis Budrys 197
Track 12＆J．G．Ballard 230