Have you not heard the story of Takashi Nagai?
He was a physician who converted from Shintoism to Roman Catholicism in the 1930’s. A physician is dedicated to doing good, not harm, to his (or her) patients. His conscience bothered him when he was ordered to report for military service.
What did he do? He went to discuss it with a Roman Catholic priest.
What did the priest tell him? He told him to read Augustine. Not Jesus. Not the apostles. Augustine. The priest sold him on 5th century Just War theory. Still, his conscience continued to trouble him. But he went where he was sent, and he did what he was ordered to do.
Did Takashi Nagai ever come to reject the Just War theory?
Take it away, AI Overview.
“Yes, Takashi Nakai fundamentally rejected Just War Theory in the post-atomic era, declaring that the invention of nuclear weapons made the concept of “just war” entirely obsolete.
While he did not write formal theological treatises picking apart the traditional components of the theory (
jus ad bellum or
jus in bello), his writings and speeches fiercely argued that modern warfare had crossed a catastrophic moral line.
The death of ‘Just War’ in the Nuclear Age
As a devout Catholic convert and a radiologist who survived the Nagasaki atomic bomb, Nagai looked at the total annihilation of his city and concluded that warfare had fundamentally changed. His rejection of Just War principles can be summarized in three core points:
• War as Global Suicide: In his famous memoir, The Bells of Nagasaki, Nagai issued a direct plea to the world: ‘Men and women of the world, never again plan war! With this atomic bomb, war can only mean suicide for the human race.’ Because Just War Theory requires a ‘reasonable probability of success’ and must avoid total destruction, Nagai argued that nuclear weapons mathematically and spiritually destroyed any possibility of a war being ‘just.’
• The Obliteration of Proportionality: A core tenet of Just War Theory is proportionality - the good achieved by a war must outweigh the harm it causes. Nagai witnessed thousands of innocent civilians, including his own wife, incinerated in a split second. He argued that the indiscriminate nature of atomic weapons completely obliterated the distinction between combatants and non-combatants, rendering the entire framework of ‘just’ military conduct impossible.
• Radical Pacifism and Forgiveness: Instead of calling for retribution or relying on state-sanctioned justice, Nagai famously urged survivors to embrace unconditional forgiveness and absolute non-violence. His grandson later summarized his grandfather’s worldview, noting that Nagai taught: ‘Even if you are the last person in this world, you should definitely shout against war.’
The Controversy of the ‘Sacrificial Lamb’
Though Nagai rejected the idea that any future war could be justified, his immediate interpretation of the end of World War II remains highly controversial. During a memorial Mass in November 1945, he suggested that the Catholic community of Urakami (the epicenter of the blast) was chosen by God as a ‘pure lamb, slaughtered and burned on the altar of sacrifice’ to expiate the sins of humankind and bring an end to the global ear.
While critics argued this framing ‘anesthetized’ survivors and absolved the United States of wartime atrocities, Nagai’s ultimate goal was not to justify the bombing, but to find meaning in the trauma so his community could rebuild without consuming itself with hatred. For Nagai, the atomic waste if Nagasaki was the ultimate evidence that humanity’s only remaining path forward was the strict commandment of love and a total refusal to bear arms.”
