The keystone of successful business is cooperation. Posted on December 27, 2017December 27, 2012 by admin “The keystone of successful business is cooperation. Friction retards progress.” — James Cash Penney Author: James Cash Penney Category: business Tags: business, James Cash Penney Spread the love Related posts: A merchant who approaches business with the The Golden Rule finds no limit of No business can succeed in any great The movie business is a big gamble.