Human Behavior and The Principle of Least An Introduction to Human George Kingsley Human Behavior and The Principle of Least An Introduction to Human Addison-Wesley FIRST First Edition, First Printing. Published by Addison-Wesley Press, 1949. Octavo. Hardcover. Book is very good with slight spine lean and shelf wear. 100% positive feedback. 30 day money back guarantee. NEXT DAY SHIPPING! Excellent customer service. Please email with any questions. All books packed carefully and ship with free delivery confirmation/tracking. All books come with free bookmarks. Ships from Sag Harbor, New York.Seller 304210 Philosophy & Psychology We Buy Books! Collections - Libraries - Estates - Individual Titles. Message us if you have books to sell!