Federalism is regarded as one of the signal American contributions to modern politics. Its origins are typically traced to the drafting of the Constitution, but the story began decades before the delegates met in Philadelphia.

In this groundbreaking book, Alison LaCroix traces the history of American federal thought from its colonial beginnings in scattered provincial responses to British assertions of authority, to its emergence in the late eighteenth century as a normative theory of multilayered government. The core of this new federal ideology was a belief that multiple independent levels of government could legitimately exist within a single polity, and that such an arrangement was not a defect but a virtue. This belief became a foundational principle and aspiration of the American political enterprise. LaCroix thus challenges the traditional account of republican ideology as the single dominant framework for eighteenth-century American political thought. Understanding the emerging federal ideology returns constitutional thought to the central place that it occupied for the founders. Federalism was not a necessary adaptation to make an already designed system work; it was the system.

Connecting the colonial, revolutionary, founding, and early national periods in one story reveals the fundamental reconfigurations of legal and political power that accompanied the formation of the United States. The emergence of American federalism should be understood as a critical ideological development of the period, and this book is essential reading for everyone interested in the American story.

During his career at Harvard, Morton Horwitz changed the questions legal historians ask. The Transformation of American Law, 1780–1860 (1977) disclosed the many ways that judge-made law favored commercial and property interests and remade law to promote economic growth. The Transformation of American Law, 1870–1960 (1992) continued that project, with a focus on ideas that reshaped law as we struggled for objective and neutral legal responses to our country’s crises.

In this book, Horwitz’s students re-examine legal history from America’s colonial era to the late twentieth century. They ask classic Horwitzian questions, of how legal doctrine, thought, and practice are shaped by the interests of the powerful, as well as by the ideas of lawyers, politicians, and others. The essays address current questions in legal history, from colonial legal practice to questions of empire, civil rights, and constitutionalism in a democracy. The essays are, like Horwitz, provocative and original as they continue his transformation of American legal history.