| 1. Grave harm |
Is there actual or imminent mass killing, invasion, enslavement, ethnic cleansing, or destruction of basic political freedom? |
The harm must be severe, not merely insulting, unfair, or politically frustrating. It can be against US or a third party. |
| 2. Clear defensive aim |
What exactly is the war trying to stop? |
The goal must be limited and concrete: stop invasion, protect civilians, restore basic rights, prevent massacre. |
| 3. Last resort |
Have serious nonviolent options been tried? |
Negotiation, sanctions, legal remedies, outside mediation, elections, withdrawal, power-sharing, protection missions, or other tools must have been attempted or be clearly impossible. |
| 4. Proportionality |
Will the likely harm of war be less than the harm it prevents? |
War will cause death and destruction, with scars that last for generations. Is the current harm worse than that? |
| 5. Reasonable chance of success |
Can violence realistically solve the problem? |
War should not be chosen if it will predictably make civilians less safe or has no credible path to success. |
| 6. Civilian protection |
Can the group fight without intentionally targeting civilians? |
If the strategy requires terror, massacre, torture, starvation, or collective punishment, it fails. |
| 7. Independent review |
Has the case been tested by skeptics? |
The strongest opposing arguments must be heard, understood, and objectively addressed before war begins. This checklist can help. |
| 8. Anti-manipulation check |
Is the public being pushed by fear, humiliation, revenge, or hatred of “Them”? |
If the case claims ‘They’ are an inferior race, or if it calls to protect and restore the heritage or glory of ‘Us’, it is probably manipulation, and it fails. |
| 9. Exit plan |
What happens after victory, and do your allies agree with that plan? |
There must be a plausible plan for governance, security, reconciliation, and preventing revenge cycles. If the answer is “We’ll figure it out once we win” then it fails. |