In On Perpetual Peace, Kant develops, as if it were the drafting of a peace treaty, his legal project to achieve a global and particular political organization for each of the States that favors peace. It is a reflection on how politically men could avoid mutual confrontation, recognizing that peace is not inherent to their nature. A work that in its brevity brings together the most outstanding aspects of Kantian philosophical thought and that, despite the time that has passed, continues to propose valid and well-founded solutions to the eternal problem of war.