I write to note a fundamental area of agreement with Professors Orren and Skowronek. And yet given this shared concern I think the study of ideas should be at the center of developmental approaches to politics. Professors Orren and Skowronek write, “The time has passed when familiar claims about constitutional foundations and normative commitments can be ventured confidently without serious consideration of confounding evidence. Making inquiries into these areas specific and empirically tractable will be, we think, value added.” I agree with this general assessment. Indeed, I have written a book, The Madisonian Constitution, which seeks to examine tensions within American constitutionalism and empirically trace how constitutional understandings and constitutional change have necessarily been partial and incomplete. In fact, I suggest that constitutional conflict has been an ordinary feature of American constitutionalism precisely because the American constitutional order is structured around agonistic principles and institutions. From the perspective of political science, understanding these tensions might also prove helpful in sustaining the American polity. But let me be clear: I do not think there is an easy foundation to be arrived at in the study of the American polity, or any other polity. Nor do I long for a world untroubled by “facing the facts,” nor for a time untroubled by historicism, positivism, or social science. I do think, however, an at times uncritical acceptance of historicism and positivism has led political scientists unnecessarily to turn away from the study of ideas and values that make up the political community.