It stems from the Bible. You know that book that our forefathers, unlike most people today, took seriously... "The heart of the wise inclines to the right, but the heart of the fool to the left." Ecclesiastes 10:2 (NIV)
Thomas Sowell <iframe width="640" height="360" src="http://www.youtube.com/embed/5KHdhrNhh88?feature=player_detailpage" frameborder="0"></iframe>