Introduction copyright © 1990 by David Drake.
“The Only Thing We Leam” by Cyril M. Kombluth. Copyright 1949 by Standard Magazines, Inc. Reprinted by permission of Richard Curtis Associates, Inc.
“C-Chute” by Isaac Asimov. Copyright 1951 by Galaxy Publishing Corporation; © renewed 1979 by Isaac Asimov. Reprinted by permission of the author.
“Allamagoosa” by Eric Frank Russell. Copyright © 1955 by Street & Smith Publications, Inc. Reprinted by permission of the agents for the author’s Estate, the Scott Meredith Literary Agency, Inc., 845 Third Avenue, New York, NY 10022.
“A Question of Courage” by J. F. Bone. Copyright © 1960 by Ziff-Davis Publications, Inc. Reprinted by permission of the Scott Meredith Literary Agency, Inc., 845 Third Avenue, New York, NY 10022.
“Superiority” by Arthur C. Clarke. Copyright 1951 by Mercury Press, Inc. From The Magazine of Fantasy and Science Fiction. Copyright renewed © 1979 by Arthur C. Clarke. Reprinted by permission of the Scott Meredith Literary Agency, Inc., 845 Third Avenue, New York, NY 10022.
“Hindsight” by Jack Williamson. Copyright 1940 by Street & Smith Publications, Inc.; renewed © 1968 by Jack Williamson. Reprinted by permission of the Spectrum Literary Agency, Inc.
“The Last Battalion” by David Drake. Copyright © 1977 by Davis Publications, Inc. Reprinted by permission of the author.
“Shadow on the Stars” by Algis Budrys. Copyright 1954 by King-Size Publications, Inc. Reprinted by permission of the author.
“Time Lag” by Poul Anderson. Copyright © 1961 by Mercury Press, Inc. From The Magazine of Fantasy and Science Fiction. Reprinted by permission of the Scott Meredith Literary Agency, Inc., 845 Third Avenue. New York, NY 10022.