In modern America, political polarization is on the rise, especially among Millennials. This paper explores why, examining moral values, worldview, and other potential moderators. In addition to a literature review and theoretical discussion, this paper will present one study of online Americans (N=500). Results indicate that subtle yet potentially important differences exist among younger generations. Younger generations were more intellectually-egotistic (p = .000; d =.65), are more overconfident in their intellect (p =.000; d =.45), and adopt a hierarchical worldview (p =.001; d =.36). Further research might examine these factors over time with long-term studies that control for the effect of aging.