Good tests kill flawed theories; we remain alive to guess again. - Karl Popper

To be ignorant of the past is to remain a child.

If in this book harsh words are spoken about some of the greatest among the intellectual leaders of mankind, my motive is not, I hope, the wish to belittle them. It springs rather from my conviction that, if our civilization is to survive, we must break with the habit of deference to great men. Great men may make great mistakes; and as the book tries to show, some of the greatest leaders of the past supported the perennial attack on freedom and reason. Their influence, too rarely challenged, continues to mislead those on whose defence civilization depends, and to divide them. The responsibility of this tragic and possibly fatal division becomes ours if we hesitate to be outspoken in our criticism of what admittedly is a part of our intellectual heritage. By reluctance to criticize some of it, we may help to destroy it all.

Democracy provides the institutional framework for the reform of political institutions (other than this framework). It makes possible the reform of institutions without using violence, and thereby the use of reason in the designing of new institutions and the adjusting of old ones. It cannot provide reason. The question of the intellectual and moral standard of its citizens is to a large degree a personal problem. (The idea that this problem can be tackled, in turn, by an institutional eugenic and educational control is, I believe, mistaken ; some reasons for my belief will be given below.) It is quite wrong to blame democracy for the political shortcomings of a democratic state. We should rather blame ourselves. In a non-democratic state, the only way to achieve reasonable reforms is by the violent overthrow of the government, and the introduction of a democratic framework. Those who criticize democracy on any ' moral ' grounds fail to distinguish between personal and institutional problems. It rests with us to improve matters. The democratic institutions cannot improve themselves. The problem of improving them is always a problem of persons rather than of institutions.