IN the manufacture of the machinery of war, man's ingenuity knows few limits. Even now, he is capable of putting orbiting H-bombs into outer space, ready to drop on signal. Tomorrow his navies may be prepared to fight at sea with ships capable of speeds up to 100 knots; his armies may be organized to battle on land with compact, radiation-proof robots.

Yet for all their terror, such weapons are not the most frightening in the armory of the future. A new book titled Unless Peace Comes (Viking; $5.75), written by 16 scientists and...

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