Understanding the roots of due process
The roots of due process go all the way back to the Magna Carta. The 13th-century charter limited the power of the king by establishing the law as the source of power. A key concept in that document was that the king couldn't seize or imprison a free person, strip them of their rights or possessions, or deny their free standing in society without a lawful judgment by their equals or the law.
The U.S. Constitution has made this concept the rule of the land. For example, the Fifth Amendment states: "No person shall be … deprived of life, liberty, or property, without due process of law; nor shall private property be taken for public use, without just compensation." Meanwhile, the Fourteenth Amendment says: "No State shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States; nor shall any State deprive any person of life, liberty, or property, without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws."