- The Just War Theory
- War must be the last resort.
- There must be some chance of success.
- The decision to go to war must be made by legitimate authority.
- The ultimate goal must be the restoration of peace
- Weapons must be used proportionately
- There must be a serious threat.
- Just War - a war that Christian churches define as acceptable. This must fir a certain criteria. The idea was developed by ST. Thomas Aquinus and the Roman Catholic Church.