The great objection to the state of nature is that, while it persists, every man is the judge in his own cause, since he must rely upon himself for the defence of his rights.
 Bertrand Russell, A History of Western Philosophy (1945). copy citation

Context

“I may even kill a thief while he is engaged in stealing my property, and this right survives the institution of government, although, where there is government, if the thief gets away I must renounce private vengeance and resort to the law. The great objection to the state of nature is that, while it persists, every man is the judge in his own cause, since he must rely upon himself for the defence of his rights. For this evil, government is the remedy, but this is not a natural remedy. The state of nature, according to Locke, was evaded by a compact to create a government. Not any compact ends the state of nature, but only that of making one body politic.” source