There are different forms of tyranny. There is tyrannus in regimine, a home-grown despot who comes to power through (more or less) legitimate means and then begins to abuse that power and oppress people. If the tyrannus in regimine plays his cards right, he can pay off enough and protect enough interest groups to stabilize his rule. In terms of prudence, it might be better to put up with him or attempt to restrain him than to overthrow him – at least this is what Jefferson taught. The second kind is the tyrannus in titula. This is one who takes control through conquest or usurpation. In terms of degrees of legitimacy, this type is the most objectionable and the one most moral to resist, at least according the Western tradition of political thought from St. Thomas through Jefferson. Rule by military conquest is the prime example of tyrannus in titula. It is completely consistent with Western principles to resist, precisely as many are doing in Iraq. [Full Article]