The verdict of history is clear. Political conservatism, born of the fear of change, is unerringly wrong-headed. Our nation's greatness arises from a willingness to embrace the challenges of the day and to lead the world in effectively addressing issues of social and economic justice. That is the true legacy of our Founding Fathers. As always, that legacy is under attack by foot-dragging conservatives whose backward-looking policies are a prescription for ceding moral and economic leadership in the 21st century.