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Samuel Johnson, 1762.

This is essentially Locke’s theory of government from his Second Treatise of Government.  In Ch. IX, Locke explains why men would form governments at all when they could remain absolutely free in the state of nature:

IF man in the state of nature be so free, as has been said; if he be absolute lord of his own person and possessions, equal to the greatest, and subject to no body, why will he part with his freedom? why will he give up this empire, and subject himself to the dominion and controul of any other power? To which it is obvious to answer, that though in the state of nature he hath such a right, yet the enjoyment of it is very uncertain, and constantly exposed to the invasion of others: for all being kings as much as he, every man his equal, and the greater part no strict observers of equity and justice, the enjoyment of the property he has in this state is very unsafe, very unsecure. This makes him willing to quit a condition, which, however free, is full of fears and continual dangers: and it is not without reason, that he seeks out, and is willing to join in society with others, who are already united, or have a mind to unite, for the mutual preservation of their lives, liberties and estates, which I call by the general name, property.

And in Ch. XIX, Locke defines the conditions that Johnson referred to as “enormous abuse” which might cause “Nature to rise up:”

Sect. 222. The reason why men enter into society, is the preservation of their property; and the end why they chuse and authorize a legislative, is, that there may be laws made, and rules set, as guards and fences to the properties of all the members of the society, to limit the power, and moderate the dominion, of every part and member of the society: for since it can never be supposed to be the will of the society, that the legislative should have a power to destroy that which every one designs to secure, by entering into society, and for which the people submitted themselves to legislators of their own making; whenever the legislators endeavour to take away, and destroy the property of the people, or to reduce them to slavery under arbitrary power, they put themselves into a state of war with the people, who are thereupon absolved from any farther obedience, and are left to the common refuge, which God hath provided for all men, against force and violence. Whensoever therefore the legislative shall transgress this fundamental rule of society; and either by ambition, fear, folly or corruption, endeavour to grasp themselves, or put into the hands of any other, an absolute power over the lives, liberties, and estates of the people; by this breach of trust they forfeit the power the people had put into their hands for quite contrary ends, and it devolves to the people, who have a right to resume their original liberty, and, by the establishment of a new legislative, (such as they shall think fit) provide for their own safety and security, which is the end for which they are in society.

That last bolded phrase is important, because it defines the threshold.  As Locke notes in Ch. XVIII, a government that does well by most people most of the time is not the sort that will or ought fall to revolution, for both moral and practical reasons:

[I]f 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 mad-man, or heady malcontent to overturn a well settled state; the people being as little apt to follow the one, as the other.

I of course, am in accord with Bentham’s critique of the doctrine of natural rights.  But Locke’s theory of government and natural rights is essentially the one that modern democracies, and certainly the American constitution, are based on.