No tyranny ever has been so unprincipled as that some appearance of equity was not maintained in it; however corrupt a government be, God never suffers it to be so much so as not to be better than anarchy [Calvin]. Although bad kings often oppress the good, yet that is scarcely ever done by public authority (and it is of what is done by public authority that Peter speaks), save under the mask of right. Tyranny harasses many, but anarchy overwhelms the whole state [Horneius]. The only justifiable exception is in cases where obedience to the earthly king plainly involves disobedience to the express command of the King of kings.
Jamieson, Robert, A. R. Fausset, and David Brown. Commentary Critical and Explanatory on the Whole Bible. Vol. 2. Oak Harbor, WA: Logos Research Systems, Inc., 1997. Print.