The international thought of the early utilitarian thinkers Jeremy Bentham and James Mill remains little known and largely misunderstood. Most commentators give them a superficial appreciation or criticize their supposed naivety, in both cases mostly assuming that Mill borrowed his
thoughts from Bentham's writings alone. This questionable reception overlooks some essential aspects of Bentham's and Mill's extensive reflections on war and peace, in particular their constant effort to overcome the tension between individual freedom and collective security. In reality, the
fertile dialogue between the two thinkers gradually crystallized into an independent utilitarian peace theory centered on law and public opinion as instruments of an ambitious reform of international relations according to the principle of utility. They managed to elaborate a fragile synthesis
between liberal principles and considerations of political realism, which grants their utilitarian peace theory a singular place in the historical efforts to systematically define the conditions of world peace.
