During a recent trip to the National Archives, I saw one of the earliest known copies of Magna Carta in existence. And I remembered one of my favorite parts of Magna Carta, the “Law of the Land” clause:
No freeman is to be taken or imprisoned or disseised of his free tenement or of his liberties or free customs, or outlawed or exiled or in any way ruined, nor will we go against such a man or send against him save by lawful judgement of his peers or by the law of the land. To no-one will we sell or deny of delay right or justice.
This pronouncement, that neither life, liberty, nor property can be taken except by the “judgment of his peers or by the law of the land,” is the constitutional predecessor of our Due Process Clause. This also served as a basis for some notion of judicial review. Some argue that this history provides for a substantive component of law, rather than a mere procedural aspect.