Within post-Kantian, liberal accounts of law, freedom emerges as the law that is moral. Opposed to the relative and restricted necessity of positive law, freedom is understood as a law that is individual and autonomously given. The space of such self-determination is protected, usually negatively, by positive law. Freedom and necessity, morality and law, autonomy and heteronomy: these summarise the oppositions within which much modern thinking has moved and moves to this day.