"Science fiction … means what we point to when we say it."

"It's a cookbook!"

"When two alien cultures meet, the stronger must transform the weaker with love or hate."

"“Don’t lose your temper,” said Ruell evenly. “It’s your worst fault, except for ignorance.”"

"We humanitarians, as our name suggests, believe that man has an ethical duty to man. We believe that the value of any…"

"No progress, either moral or material, can be made in a world which is frozen, like ours, into a rigid mold of suppre…"

"Voluntary birth control methods only work on the people who choose to use ’em. A population check that doesn’t work o…"

"Eagles had made a realist of him. He believed in facts, and in altering your viewpoint to fit them, no matter what th…"

"A society that put more emphasis on birth than ability was likely to breed ability out of its ruling class."

"Imaro exploded. "Why do men fight like starving lions over yellow metal and let valuable cattle go?""