Montesquieu is among the most important figures in the history of political thought, yet his published writings reveal next to nothing regarding his personal life. This volume provides the first English translations of letters revealing the character, lifestyle, and ambitions of this titled aristocrat, landowner, feudal lord, wine producer, and influential author. The letters chosen include intimate details regarding his marriage, family life, dalliances, and literary ambitions alongside frank assessments of French and European politics, warfare, and religion that would have aroused government censors if made public. We learn how eagerly Montesquieu sought entry into Parisian social circles after publishing his Persian Letters (1721), and we see how greatly he valued friendships with Parisian women whose influence at court could protect writers criticizing the existing order. In sum, the letters translated for this volume provide crucial context for his published work, illuminating how his life experiences shaped his worldview.