The only lesson we learn from history is that we never learn from history. Primitive weakness destroys just as surely in the age of Rock and Roll as it did in the days of the harp or the spinet. Man has nothing to fear so much as human frailty. Material progress alone means nothing. Whether you kill your enemy with a club, a musket, or an atomic bomb... he is equally dead! Civilisation will be no better a thousand years from now unless man changes his nature. An ape in a space ship is just as much a jungle beast as an ape in a tree.

Fear is the fetter that holds the cave man, the twentieth century man and the space man of tomorrow. Doubt is his chain.

This is an intensely gripping, human story of the men who will fly space liners into infinity... The man who can conquer himself can conquer a galaxy.