Originally devised by Greek and Roman philosophers, the "just war theory" was developed by Christian theologians. With some variations, it is widely cited and applied by various religions today.

Here we outline the six steps to a just war and square them with the issues at stake.

1. The war must be for a just cause
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2. The war must be declared by a lawful authority
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3. The intention behind the war must be good
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4. All other ways of resolving the problem should have been tried
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5. There must be a reasonable chance of success
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6. The means used must be in proportion to the end that the war seeks to achieve
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JUST WAR THEORY
Force can be used as a last resort
Defines conditions for declaring war & limits to conduct in war
Some Muslims claim it's similar to 'jihad' - spiritual warfare

» Could this be a 'just' war?