sentences:  Quakers in the unprogrammed or "silent worship" tradition of Quaker practice have in the 20th century begun to examine the significance of nontheistic beliefs in the Society of Friends, as part of the Quaker tradition of seeking truth.Non-theism among Quakers probably dates to the 1930s, when some Quakers in California branched off to form the Humanist Society of Friends (today part of the American Humanist Association), and when Henry Cadbury professed agnosticism in a 1936 lecture to Harvard Divinity School students.The term "non-theistic" first appeared in a Quaker publication in 1952 on conscientious objection.