The Power of Positive Thinking shows, organized the American Foundation of Religion and Psychiatry, and co-founded the spiritual newsletter "Guideposts" with his wife, Ruth Stafford Peale. "The Power of Positive Thinking" was published in October 1952 and continues to be Peale's most widely read work. It lived on the New York Time's best-sellers list for 186 weeks, 48 of which were spent in the No. 1 nonfiction spot. The book sold more than 5 million copies worldwide — 2.5 million from 1952 to 1956 — and was eventually translated into over 40 languages. Other books published by Peale around 1952 include "The Art of Real
Essays in Positive Economics Essays in Positive Economics Milton Friedman's book Essays in Positive Economics (1953) is a collection of earlier articles by the author with as its lead an original essay "The Methodology of Positive Economics." This essay posits Friedman's famous, but controversial, principle (called the F-Twist by Samuelson) that assumptions need not be "realistic" to serve as scientific hypotheses; they merely need to make significant predictions. This first essay in the book explores John Neville Keynes's distinction between "positive" and "normative" economics, what "is" vs. what "ought to be" in economic matters. The essay sets out an epistemological program for Friedman's own