In roughly two centuries, European philosophers worked out a new account of where authority came from. Hobbes said the sovereign's power was granted by a tacit contract individuals signed to escape the war of all against all. Locke said the contract was conditional and revocable, and that the governed retained the right to dissolve any government that broke its terms. Rousseau said legitimate authority was the general will of the people themselves, not any individual monarch. Each argument sharpened the previous one. By 1789 the conclusions had been put on parchment and fired out of muskets on two continents.