sense, is but an increasingly complex and extended method of purification—the purification of the conditions of life by sound legislation, the purification of our own minds by better knowledge, the purification of our hearts by a growing sense of responsibility, the purification of the race itself by an enlightened eugenics, consciously aiding Nature in her manifest effort to embody new ideals of life. It was not Man, but Nature, who realized the daring and splendid idea—risky as it was—of placing the higher anthropoids on their hind limbs and so liberating their fore-limbs in the service of their nimble and aspiring brains. We may humbly follow in the same path, liberating latent forces of life and suppressing those which no longer serve the present ends of life. For, as Shakespeare said, when in The Winter's Tale he set forth a luminous philosophy of social hygiene and applied it to eugenics,
In whatever way it may be understood, however, social hygiene is now very much to the front of people's minds. The present volume, I wish to make clear, has not been hastily written to meet any real or supposed demand. It has slowly grown during a period of nearly twenty-five years, and it expresses an attitude which is implicit or explicit in the whole of my work. By some readers, doubtless, it will be seen to constitute an extension in various directions of the arguments developed in the larger work on "Sex in Relation to Society," which is the final volume of my Studies in the Psychology of Sex. The book I now bring forward may, however, be more properly regarded as a presentation of the wider scheme of social reform out of which the more special sex studies have developed. We are faced to-day by the need for vast and complex changes in social organization. In these changes the welfare of individuals and the welfare of communities are alike concerned. Moreover, they are matters which are not confined to the affairs of this nation or of that nation, but of the whole family of nations participating in the fraternity of modern progress.
The word "progress," indeed, which falls so easily from our lips is not a word which any serious writer should use without precaution. The