The extent to which human aggression exemplifies innate tendencies is not clear.

It is not a question of starting. The start has been made. It's a question of what's to be done from now on.

Any single historical event is too complex to be adequately known by anyone. It transcends all the intellectual capacities of men. Our practice is to wait until a sufficient number of details have been forgotten. Of course things seem simpler then! Our memories work that way; we retain the facts which are easiest to think about.

Twenty-five hundred years ago it might have been said that man understood himself as well as any other part of the world. Today he is the thing he understands least.

It is a surprising fact that those who object most violently to the manipulation of behaviour nevertheless make the most vigorous effort to manipulate minds.

If you're old, don't try to change yourself, change your environment.

If freedom is a requisite for human happiness, then all that’s necessary is to provide the illusion of freedom.