A concise, literary biography of Louis Antoine de Saint-Just, the young Jacobin leader whose name remains inseparable from the most radical phase of the French Revolution. Jean-Jacques Lafaye reconstructs Saint-Just’s life through sharply drawn scenes and reflections, tracing his rise from provincial youth to revolutionary theorist, soldier, and close ally of Robespierre. The work emphasizes Saint-Just’s political imagination, rhetorical force, and uncompromising role in the events of 1793–1794, while also considering the personal ambitions and ideological certainties that shaped his public career. Rather than offering an exhaustive chronicle, it presents a compact portrait of a figure often remembered as severe, brilliant, and fatalistic. This edition is useful for readers interested in revolutionary France, political biography, and the lives of figures who helped define the Terror and its aftermath.