By Wanjiru Njoya
Mises.org
September 3, 2026
In the Ethics of Liberty, Murray Rothbard argued that aggressive war is always immoral and must always be opposed. The just war doctrine should be understood not as a moral toolkit that can be harnessed to justify aggressive war, but, on the contrary, as an exception to the foundational anti-war principle. This means that the just war exception should never become more important than the anti-war rule.