I never really “chose” to be on the left side of the political spectrum. I just ended up there because the traditional left was more logical than right and center if you come at life from the point-of-view implied in the founding documents of the American Republic (alas, now past). In America the left is really fulfilling the role of conserving the ideas and ideals of the American Revolution. Generally we believe in the rule of law rather than the law of privilege. But most importantly we believe in using principles established during the enlightenment that reason and science should be appealed to in setting public policy. Religion does not work as a foundation for public policy because people differ in religious principles. We, in the West, did not invent reason but we were the first to realize that appeal to reason was the only way to wars like the Thirty-Years War which devasted much of parts of Europe (mainly Germany) much as Afghanistan is devasted now.