[1] During this time, Jacks' circle of associates included George Bernard Shaw, Sidney and Beatrice Webb, and Oscar Wilde.

[1] In September 1915, he wrote in support of the war effort, citing the need to defeat German militarism and defend "the liberties of our race."

He frequently returned to the theme of militarism and the "mechanical" mindset, which he regarded as one of the greatest threats in modern life.

[1] In 1922 Jacks hosted Austrian philosopher, Dr Rudolf Steiner, to present a conference at Manchester College on values in education and to share the experiences of the model Waldorf school at Stuttgart.

Jacks published prolifically over a period of fifty years, including philosophical and visionary treatises, biographies, articles, and moral parables.