Next to enjoying ourselves, the next greatest pleasure consists in preventing others from enjoying themselves, or, more generally, in the acquisition of power.

At all times, except when a monarch could enforce his will, war has been facilitated by the fact that vigorous males, confident of victory, enjoyed it, while their females admired them for their prowess.

This is one of those views which are so absolutely absurd that only very learned men could possibly adopt them.

Conquer the world by intelligence, and not merely by being slavishly subdued by the terror that comes from it.

Most of the greatest evils that man has inflicted upon man have come through people feeling quite certain about something which, in fact, was false.

Science has made unrestricted national sovereignty incompatible with human survival. The only possibilities are now world government or death.

Without civic morality communities perish; without personal morality their survival has no value.