In the first half of Chapter XVIII of his 2d Treatise on Government: Of Civil Government, “Of Tyranny,” John Locke describes how tyrants differ from lawful rulers. (See “John Locke: How to Recognize a Tyrant.”) In the second half of that chapter, he lays out an argument he must confront. What if his interlocutor said something like this:

§. 203. May the commands then of a prince be opposed? may he be resisted as often as any one shall find himself aggrieved, and but imagine he has not right done him? This will unhinge and overturn all polities, and, instead of government and order, leave nothing but anarchy and confusion. 

John Lock gives a subtle answer, laying out how to appropriately oppose a tyrant.

John Locke’s Rules for those Who Would Oppose Tyrants

1. Don’t escalate the use of force; don’t start by physically attacking the tyrant.

§. 204.  To this I answer, that force is to be opposed to nothing, but to unjust and unlawful force; whoever makes any opposition in any other case, draws on himself a just condemnation both from God and man; and so no danger or confusion will follow, as is often suggested, for,  

§. 205. First, As, in some countries, the person of the prince by the law is sacred; and so, whatever he commands or does, his person is still free from all question or violence, not liable to force, or any judicial censure or condemnation. … unless he will, by actually putting himself into a state of war with his people, dissolve the government, and leave them to that defence which belongs to every one in the state of nature: for of such things who can tell what the end will be? and a neighbour kingdom has shewed the world an odd example. In all other cases the sacredness of the person exempts him from all inconveniences, whereby he is secure, whilst the government stands, from all violence and harm, whatsoever; than which there cannot be a wiser constitution: for the harm he can do in his own person not being likely to happen often, nor to extend itself far; nor being able by his single strength to subvert the laws, nor oppress the body of the people, should any prince have so much weakness, and ill-nature, as to be willing to do it, the inconveniency of some particular mischiefs, that may happen sometimes, when a heady prince comes to the throne, are well recompensed by the peace of the public, and security of the government, in the person of the chief magistrate, thus set out of the reach of danger: it being safer for the body, that some few private men should be sometimes in danger to suffer, than that the head of the republic should be easily, and upon slight occasions, exposed.

Any kind of immunity of a tyrant can seem galling, but John Locke points out that personal immunity typically typically does not, by itself, allow a tyrant to do a huge amount of harm.

2. Question, oppose and resist unjust, illegal acts, regardless of a tyrant’s endorsement of them, while continuing to respect and obey just and legal actions of the tyrant.

§. 206. Secondly, But this privilege, belonging only to the king’s person, hinders not, but they may be questioned, opposed, and resisted, who use unjust force, though they pretend a commission from him, which the law authorizes not; as is plain in the case of him that has the king’s writ to arrest a man, which is a full commission from the king; and yet he that has it cannot break open a man’s house to do it, nor execute this command of the king upon certain days, nor in certain places, though this commission have no such exception in it; but they are the limitations of the law, which if any one transgress, the king’s commission excuses him not: for the king’s authority being given him only by the law, he cannot impower any one to act against the law, or justify him, by his commission, in so doing; the commission, or command of any magistrate, where he has no authority, being as void and insignificant, as that of any private man; the difference between the one and the other being that the magistrate has some authority so far, and to such ends, and the private man has none at all: for it is not the commission, but the authority, that gives the right of acting; and against the laws there can be no authority. But, notwithstanding such resistance, the king’s person and authority are still both secured, and so no danger to governor or government.  

For those on a tyrant’s staff, one of the best ways to resist an unjust or illegal command of the tyrant is to do nothing. Whenever doing nothing can stop the tyrant in his tracks, this is a very attractive option.

3. Exhaust opportunities for appeal before taking up arms.

§. 207. Thirdly, Supposing a government wherein the person of the chief magistrate is not thus sacred; yet this doctrine of the lawfulness of resisting all unlawful exercises of his power, will not upon every slight occasion indanger him, or imbroil the government: for where the injured party may be relieved, and his damages repaired by appeal to the law, there can be no pretence for force, which is only to be used where a man is intercepted from appealing to the law: for nothing is to be accounted hostile force, but where it leaves not the remedy of such an appeal; and it is such force alone, that puts him that uses it into a state of war, and makes it lawful to resist him. A man with a sword in his hand demands my purse on the highway, when perhaps I have not twelve pence in my pocket: this man I may lawfully kill. To another I deliver 100l. to hold only whilst I alight, which he refuses to restore me, when I am got up again, but draws his sword to defend the possession of it by force, if I endeavour to retake it. The mischief this man does me is a hundred, or possibly a thousand times more than the other perhaps intended me (whom I killed before he really did me any;) and yet I might lawfully kill the one, and cannot so much as hurt the other lawfully. The reason whereof is plain; because the one using force, which threatened my life, I could not have time to appeal to the law to secure it: and when it was gone, it was too late to appeal. The law could not restore life to my dead carcass: the loss was irreparable; which to prevent, the law of nature gave me a right to destroy him, who had put himself into a state of war with me, and threatened my destruction. But in the other case, my life not being in danger, I may have the benefit of appealing to the law, and have reparation for my 100l. that way.  

A key test of how bad a tyrant is is whether the tyrant tries to interfere with an appeal of his decision to a court of law.

4. Enforce the law yourself before taking up arms in civil war.

§. 208. Fourthly, But if the unlawful acts done by the magistrate be maintained (by the power he has got,) and the remedy which is due by law be by the same power obstructed; yet the right of resisting, even in such manifest acts of tyranny, will not suddenly, or on slight occasions, disturb the government: for if it reach no farther than some private men’s cases, though they have a right to defend themselves, and to recover by force what by unlawful force is taken from them; yet the right to do so will not easily engage them in a contest, wherein they are sure to perish; it being as impossible for one, or a few oppressed men to disturb the government, where the body of the people do not think themselves concerned in it, as for a raving madman, or heady malcontent to overturn a well-settled state: the people being as little apt to follow the one, as the other.  

To distil this into a maxim: “Don’t be a rebel when you can be a vigilante instead.”

5. Take up arms in civil war only if the tyranny is systematic.

§. 209. But if either these illegal acts have extended to the majority of the people; or if the mischief and oppression has lighted only on some few, but in such cases, as the precedent, and consequences seem to threaten all; and they are persuaded in their consciences, that their laws, and with them their estates, liberties, and lives are in danger, and perhaps their religion too; how they will be hindered from resisting illegal force, used against them, I cannot tell. This is an inconvenience, I confess, that attends all governments whatsoever, when the governors have brought it to this pass, to be generally suspected of their people; the most dangerous state which they can possibly put themselves in; wherein they are the less to be pitied, because it is so easy to be avoided; it being as impossible for a governor, if he really means the good of his people, and the preservation of them, and their laws together, not to make them see and feel it, as it is for the father of a family, not to let his children see he loves, and takes care of them.  

§. 210. But if all the world shall observe pretences of one kind, and actions of another; arts used to elude the law, and the trust of prerogative (which is an arbitrary power in some things left in the prince’s hand to do good, not harm to the people) employed contrary to the end for which it was given: if the people shall find the ministers and subordinate magistrates chosen suitable to such ends, and favoured, or laid by, proportionably as they promote or oppose them: if they see several experiments made of arbitrary power, and that religion underhand favoured, (though publicly proclaimed against) which is readiest to introduce it; and the operators in it supported, as much as may be; and when that cannot be done, yet approved still, and liked the better: if a long train of actions shew the councils all tending that way; how can a man any more hinder himself from being persuaded in his own mind, which way things are going; or from casting about how to save himself, than he could from believing the captain of the ship he was in was carrying him, and the rest of his company to Algiers, when he found him always steering that course, though cross winds, leaks in his ship, and want of men and provisions did often force him to turn his course another way for some time, which he steadily returned to again, as soon as the wind, weather, and other circumstances would let him?

To me, a key sign of whether the tyranny is systematic is whether resisting often leads the tyrant to give in and do better, or whether resisting leads to an escalation on the part of the tyrant against those who are resisting. Escalation by a tyrant goes a long way toward making the tyranny systematic, which, if carried far enough, may justify taking up arms against the tyrant.

For links to other John Locke posts, see these John Locke aggregator posts: 

• John Locke's State of Nature and State of War

• On the Achilles Heel of John Locke's Second Treatise: Slavery and Land Ownership

• John Locke Against Natural Hierarchy

• John Locke's Argument for Limited Government