According to Brendon Burchard, the main motive of humans is the pursuit of greater personal freedom, which includes much more than simply living in a democracy like the United States. Different types of freedom Burchard touches on are financial freedom (common motivator for entrepreneurs and others looking to earn money online), emotional freedom, choice-time freedom, social freedom, and spiritual freedom. Burchard explains that there are two "enemies" standing in our way: one being external and the other internal. Because freedom is one of the top motivating factors of entrepreneurs, I think this will be a great read.