If a man has lived in a tradition which tells him that nothing can be done about his human condition, to believe that progress is possible may well be the greatest revolution of all.

We cannot cheat on DNA. We cannot get round photosynthesis. We cannot say I am not going to give a damn about phytoplankton. All these tiny mechanisms provide the preconditions of our planetary life. To say we do not care is to say in the most literal sense that we choose death.

Jews were the first to believe that history itself has meaning and that progress, not repetition, is the law of life.

The modern world is not given to uncritical admiration. It expects its idols to have feet of clay and can be reasonably sure that the press and camera will report their exact dimensions.

It is a fact of history that those who seek to withdraw from its great experiments usually end up being overwhelmed by them.

Fear can indeed be the beginning of wisdom.

the wealthy white western minority of the world could not hope to prosper if most of the rest of mankind were foundering in hopeless poverty. Islands of plenty in a vast ocean of misery never have been a good recipe for commercial success.

the distinction between rich nations and poor nations is one of the great dominant political and international themes of our century.

It is very much easier for a rich man to invest and grow richer than for the poor man to begin investing at all. And this is also true of nations.

in modern society, fear of unemployment remains the darkest of the shadows thrown by the past. In an industrial order, a man out of work is almost a man out of life.

There is no human failure greater than to launch a profoundly important endeavour and then leave it half done.

The raw material from which social institutions are fashioned is always more or less recalcitrant and any human society will tend to produce a caricature of itself.

The gaps in power, the gaps in wealth, the gaps in ideology which hold the nations apart also make up the abyss into which mankind can fall to annihilation.

man's oldest and least reputable occupation - war.