This book deals with critical aspects of English historical, constitutional and political thought from the Middle Ages to the early modern period. In particular, the book is a study of the ways in which history could be deployed for all kinds of political purposes. The entire story of the historical construct of the "radical ancient constitution" is told, focusing on the ways in which rebels turned to important medieval sources including the so-called "Laws" of Edward the Confessor, in an effort to legitimize resistance, deposition and regicide.