This collection addresses the importance of ideas, and ideas of importance, to American politics at the beginning of a new century. On the one hand, the contributors find a distressing absence of ideas in American politics and a parallel rise of the power of political identities, interests, and other detrimental influences. On the other hand, many of the ideas that are present are superficial and unproductive. The contributors debate the role of the major political parties in developing and promoting better ideas to reenergize American politics in the next century, and address the search for a workable public philosophy, party responsibility, party policy among Republicans and Democrats, and democratic citizenship.