Individualist anarchism comes closest to classical liberalism, sharing its concepts of private property and economic exchange, as well as its definitions of freedom as the absence of restraint, and justice as the reward of merit. Indeed, the individualist develops the liberal concept of the sovereignty of the individual to such an extent that it becomes incompatible with any form of government or State. Each person is considered to have an inviolable sphere which embraces both his body and his property. Any interference with this private sphere is deemed an invasion: the State with its coercive apparatus of taxation, conscription, and law is the supreme invader.