I wrote some time back that discussion of the rights and wrongs of the Easter Rising seemed to be entirely focused on Just War Theory, a theory probably not best suited to judge a rebellion. The discussion still seems focused there, even though the best known proponent of Just War Theory, Thomas Aquinas, draws a distinction between war and sedition (conflict between parts of the state), and states that there is no sedition in disturbing a government which is not directed towards the common good1.
Philosophy of Rebellion – a brief history
This idea has roots in Isidore of Seville’s suggestion that an unjust ruler was no ruler at all, and John of Salisbury’s endorsement of killing tyrants under specific circumstances2. In the natural law tradition the validity of tyranicide was still argued into modern times. Some argued that only judges or the pope could intervene, but others such as Luis de Molina SJ (1535-1600) said that a tyrant who was an usurper or invader ‘can be justly killed by any member of the commonwealth’ as long as the action would not cause greater evil3.