The Law Academy published the following video on 8th July 2026.

The lecture explains the origins and central ideas of classical natural law, focusing on the contributions of Plato, Aristotle, and Cicero, while leaving Thomas Aquinas for a later discussion. It begins by defining natural law as the view that law is more than the commands of political authorities: it must conform to higher standards such as reason, nature, the common good, or divine order. The lecturer argues that positive law can therefore be judged against objective moral standards. Although Plato did not formulate a complete theory of natural law, he laid its philosophical foundations by rejecting the idea that justice is simply whatever rulers decree. Through dialogues such as the Republic, Plato maintains that law should guide both the soul and the political community toward rational order and virtue, drawing on his famous Theory of the Forms, according to which justice participates in an objective and ideal reality.

The lecture then presents Aristotle as the principal intellectual source of the classical natural law tradition and the thinker who most strongly influenced Aquinas. Unlike Plato, Aristotle locates moral standards not in a transcendent realm but in human nature itself. Human beings are naturally social and political animals whose ultimate end (telos) is eudaimonia, or human flourishing, achieved through the cultivation of virtue. Within this framework, law exists not merely to maintain public order but to promote the common good and moral education. The lecturer also explains Aristotle's distinction between general justice (complete virtue in relation to others), distributive justice (the proportional allocation of benefits and burdens), and corrective justice (restoring equality after private wrongs such as theft, fraud, or assault). These ideas continue to influence modern legal concepts, particularly compensation, restitution, and unjust enrichment.

Finally, the lecture examines Cicero, who adapted Greek philosophy—especially Stoicism—to the Roman world and transformed natural law into a more universal doctrine. Cicero famously defines true law as "right reason in agreement with nature," implying that not every enacted rule possesses genuine moral authority. Because all human beings share reason, they also share access to universal principles of justice that transcend individual states. This universal perspective led to the development of the concept of ius gentium (the law of nations), an important precursor of international law. The lecturer concludes that Cicero forms the intellectual bridge between the Greek philosophers and the medieval Christian tradition of Augustine and Aquinas, completing the classical foundations upon which later natural law theory would be built.