SOURCE: An introduction to Love and Marriage by Ellen Key, translated by Arthur G. Chater, G. P. Putnam's Sons, 1911, pp. vii-xvi.

Ellis was a pioneering sex psychologist and a respected English literary figure. His most famous work is The Psychology of Sex (1897-1928), a seven-volume study containing case histories of sex-related psychological abnormalities, which was greatly responsible for changing British and American attitudes toward sexuality. In addition to his writings on psychology, Ellis edited a series of English dramas and retained an active interest in literature throughout his life. In the following essay, originally published in 1910, and later published as an introduction to the 1911 English translation of Key's Love and Marriage, Ellis provides a critical biography of Key.

Ellen Key, whose most important book [Love and Marriage] is here for the first time presented in English, is no stranger in the English-speaking world. Her Century of the Child...