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 reached a stage at which it is admitted by every one who counts (except at the Vatican), that there is nothing in earth or heaven which may not legitimately be treated without any of the assumptions which in old days authority used to impose.

In this brief review of the triumphs of reason in the nineteenth century, we have been considering the discoveries of science and criticism which made the old orthodoxy logically untenable. But the advance in freedom of thought, the marked difference in the general attitude of men in all lands towards theological authority to-day from the attitude of a hundred years ago, cannot altogether be explained by the power of logic. It is not so much criticism of old ideas as the appearance of new ideas and interests that changes the views of men at large. It is not logical demonstrations but new social conceptions that bring about a general transformation of attitude towards ultimate problems. Now the idea of the progress of the human race must, I think, be held largely answerable for this change of attitude. It must, I think, be held to have operated powerfully as a solvent of theological beliefs. I have spoken of the teaching of Diderot and his friends that man's energies should be devoted to making the earth pleasant. A