The Introduction examines the historiography of the idea of the state in twentieth- and twenty-first-century Machiavellian scholarship. It analyses the empirical and methodological problems associated with this specialist literature, before then outlining a new way of reconstructing Machiavelli’s theory of lo stato – and of interpreting it as the very crux of his political philosophy – by laying out a new intellectual basis upon which to reorient our present understanding of the foundations of Machiavelli’s conceptualization of the state from his earliest writings onwards. It draws new attention to the formative role in Renaissance political discourse of a sequence of theories – subsequently discussed in each chapter of Part I of the book – which were drawn from classical Roman political, moral, rhetorical, and aesthetic thought and which came to shape decisively Machiavelli’s own theory. And it forwards the contention, substantiated in detail in Part II, that his theory underwent two redactions, first in The Prince and then in the Discourses. The Introduction closes by broaching the crucial question of whether, in classifying Machiavelli as a singularly pioneering theorist of the state in the early modern period, we should also see him as a theorist of state personality.