New York: George H. Doran, (1923). Hardcover first edition - The author's foreword notes that "The substance of this little book was delivered in the form of two lectures given at the invitation of the Hibbert Trustees in Manchester, Liverpool, Leeds and Birmingham during March and April, 1922." Jacks was an English educator, philosopher, and Unitarian minister. Among his early associates were associates included George Bernard Shaw, Sidney and Beatrice Webb, and Oscar Wilde, and in 1922 he hosted the Austrian philosopher and educator, Dr Rudolf Steiner, at Manchester. A small slim volume. 92 pp.