The Source and Aim of Human Progress By Birus Sidis Books / Hardcover Social Science › Psychology & Psychiatry Publisher: Richard Badger, January 1919 Price $11.88 Free Shipping Send to a friend Used - Acceptable Acceptable condition. Former Library book. Paperback rebound in hardcover. Writing inside. (psychology) $11.88 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store.