Much of this book flowed from conversations with people in a wide range of fields, including religion, politics, sociology, business, and the arts. In all such cases, I have made my sources clear in the text. In other instances, I have benefited from the writings and research of experts and academics. Usually, I would include the specific citations as a footnote in the printed text. I have deviated from that practice here for several reasons.

First, in all honesty, writers don’t like footnotes—with the possible exception of those who worry treatises out of keyboards. Tiny superscript numbers are the typeface equivalent of a stage whisper or, worse, a sharp elbow in the side. They are distracting and interrupt the flow of thought. At best, ...

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