Change is one thing, progress is another. 'Change' is scientific, 'progress' is ethical; change is indubitable, whereas progress is a matter of controversy.

As a philosopher, if I were speaking to a purely philosophic audience I should say that I ought to describe myself as an Agnostic, because I do not think that …

After ages during which the earth produced harmless trilobites and butterflies, evolution progressed to the point at which it generated Neros, Genghis Khans, a…

When one admits that nothing is certain one must, I think, also admit that some things are much more nearly certain than others. It is much more nearly certain…

Usually, terrible things that are done with the excuse that progress requires them are not really progress at all, but just terrible things.

I cannot believe - and I say this with all the emphasis of which I am capable - that there can ever be any good excuse for refusing to face the evidence in fav…

Science cannot be stopped. Man will gather knowledge no matter what the consequences - and we cannot predict what they will be. Science will go on - whether we…