A Left-Handed History of the World has now been updated to include a chapter on President Obama. About 10 per cent of the general population is left-handed. However 16 per cent of American presidents have been lefties and a disproportionately high number of left-handers feature in influential moments through history, from Julius Caesar to Bill Gates. Through fascinating case studies of notables from ancient to modern times, Ed Wright explains the secret of lefty success. Psychology meets history in this fascinating and popular look at being left-handed and its effects on our world.