Definition
Per legem terræ (Latin: "by the law of the land") is a phrase drawn from Magna Carta signifying that no person may be deprived of life, liberty, or property except through lawful process recognized by the established law of the realm. In Anglo-American legal tradition, the phrase is treated as the historical forerunner of—and functional equivalent to—the modern constitutional guarantee of due process of law.
The phrase appears in Chapter 39 of Magna Carta (1215): "No free man shall be taken or imprisoned... except by the lawful judgment of his peers or by the law of the land." This formulation became the textual anchor for centuries of argument about the limits of sovereign power over the individual.
Common Confusion
Per legem terræ and due process of law are routinely treated as synonyms, and for most practical purposes they are. The distinction worth preserving is historical rather than doctrinal: per legem terræ is the original Magna Carta formulation, while "due process of law" is the translation introduced by Edward III's statute of 1354 and later embedded in the Fifth and Fourteenth Amendments to the U.S. Constitution. Researchers citing historical sources should be alert to the fact that these phrases traveled parallel tracks before converging. Some early commentators—particularly those working in the natural law tradition—argued that per legem terræ carried a broader substantive content than procedural due process alone, a distinction that echoes in later debates over substantive due process.
Why It Matters in Research
The phrase is a research marker more than a living legal term. Encountering it in primary sources—a colonial charter, an early American court opinion, a state constitutional convention debate—signals that the author is invoking the Magna Carta lineage deliberately, usually to argue that a government action violates foundational rather than merely statutory limits.
Several research traps attach to this term:
First, spelling and Latinization vary across historical sources. Researchers will find terræ, terrz, terrae, and terre used interchangeably depending on the printer, period, and jurisdiction. Search strategies in digitized corpora must account for these variants.
Second, the phrase's meaning was contested in early American courts. Some judges read per legem terræ to require only that government follow its own existing procedures; others read it to impose substantive limits on what procedures could be used against an individual regardless of positive law. This tension predates the substantive/procedural due process distinction familiar to modern constitutional lawyers, and early opinions invoking per legem terræ may be arguing one side of that debate without naming it as such.
Third, state constitutional research is particularly affected. Many early state constitutions incorporated law-of-the-land clauses before federal due process doctrine was developed. Courts in those states built independent bodies of law around the phrase. A researcher working in pre-Civil War Pennsylvania, North Carolina, or Tennessee case law will encounter per legem terræ doing doctrinal work that later migrated entirely to federal constitutional vocabulary.
Historical Dictionary Support
Black's Law Dictionary (2nd Ed.) defines the phrase concisely: "By the law of the land; by due process of law," and immediately equates the two formulations. The entry cites U.S. v. Kendall, Appeal of Ervine, and Rhinehart v. Schuyler—all nineteenth-century American cases—suggesting that by Black's time the phrase was understood as a direct translation of due process rather than a distinct concept.
What Black's does not capture is the interpretive controversy that surrounded the phrase in earlier decades. The equation of per legem terræ with due process was itself a jurisprudential conclusion, not an obvious linguistic fact. Earlier commentators, including Chancellor Kent and Justice Story in their respective treatises, treated the Magna Carta lineage as evidence of substantive constitutional limits—a reading that the phrase's Latin formulation rhetorically supported even when positive law was silent.
Historical dictionaries generally agree on the translation but differ in how much weight they assign to the phrase's independent content. For sources predating the mid-nineteenth century, the phrase carries more argumentative freight than modern references suggest.
Jurisdictional Note
While per legem terræ is a phrase of English and early American constitutional law, its operational content is now almost entirely absorbed into federal and state due process doctrine. Researchers encountering the phrase in state court opinions should check whether the relevant state constitution contains a "law of the land" clause, which may have been interpreted independently of federal due process precedent.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Due Process of Law; Magna Carta in American Constitutional History.