Definition
Per legem terrae (Latin: "by the law of the land") is a foundational phrase of English and American constitutional law denoting that no person may be deprived of life, liberty, or property except through established legal procedures and substantive legal authority. The phrase originates in Chapter 39 of Magna Carta (1215), which provided that no free man shall be seized, imprisoned, dispossessed, outlawed, exiled, or otherwise ruined except by lawful judgment of his peers or by the law of the land.
In its constitutional dimension, per legem terrae is the historical antecedent of the "due process of law" clause found in the Fifth and Fourteenth Amendments to the U.S. Constitution. The two phrases are treated as functionally equivalent in American constitutional jurisprudence, though they carry distinct historical freight and appear in different textual contexts.
Common Confusion
Per legem terrae is frequently treated as a mere Latin variant of "due process of law," but the two phrases have independent textual histories. Per legem terrae is the Magna Carta formulation; "due process of law" is the 1354 statutory reformulation that eventually entered American constitutional text. The practical legal content is the same in most modern contexts, but tracing either phrase's doctrinal development requires understanding when and why the language shifted. Conflating them without noting the distinction can obscure important historical transitions in the evolution of procedural and substantive constitutional protections.
Why It Matters in Research
Researchers working in early common law sources, colonial charters, and founding-era constitutional texts will encounter per legem terrae as the operative phrase where modern sources would say "due process." The equivalence is not always made explicit, and failing to recognize it can cause a researcher to undercount the depth of the due process tradition in historical materials.
The phrase appears prominently in English statutory confirmations of Magna Carta, in Edward III's Statute of 1354 (which first substituted "due process of law" for the Magna Carta language), and in early American state constitutions, several of which retained the "law of the land" formulation rather than adopting "due process" directly. Massachusetts, North Carolina, and Tennessee constitutions, for example, used "law of the land" language that traces directly to per legem terrae. Researchers examining state constitutional due process doctrine must track which formulation a given state adopted, because some state courts developed independent "law of the land" jurisprudence that diverges from federal due process analysis.
When searching historical legal dictionaries, treatises, and case reporters, per legem terrae will often appear untranslated or in partial Latin, and cross-references to "due process" may be absent. Conversely, modern due process scholarship frequently omits the Latin phrase entirely, creating a research gap between historical and contemporary sources on what is substantively the same legal principle.
The phrase also appears in contexts outside constitutional law — in older common law pleading and in ecclesiastical sources — where it signals conformity with established law generally rather than constitutional protection specifically. Context is essential to determining which sense is operative.
Historical Dictionary Support
Bouvier's entry for per legem terrae is notably sparse: it provides only the translation "by the law of the land" before moving immediately to the adjacent entry per minas. This brevity is misleading given the phrase's constitutional significance. Bouvier's fuller treatment of the underlying concept appears under his entries for DUE PROCESS OF LAW and MAGNA CARTA, where he traces the equivalence between the Latin phrase and the Fifth Amendment guarantee. Researchers relying on Bouvier should not expect per legem terrae to function as a standalone entry — it serves as a cross-reference node to those larger treatments.
Historical dictionaries generally agree on the translation and Magna Carta origin. Where they diverge is in the degree to which they foreground the phrase's transformation into "due process" through Edward III's 1354 statute. Older dictionaries treat the Latin as primary and the English equivalent as derivative; modern constitutional scholarship reverses this emphasis. Neither framing is wrong, but researchers should be aware that the weight assigned to each reflects the era of the source, not a substantive legal difference.
Jurisdictional Note
In American law, most states with "law of the land" clauses in their constitutions treat the phrase as coextensive with federal due process, but a minority of state courts have interpreted it as providing independent or broader protection. Researchers doing state constitutional litigation or history should not assume automatic equivalence without checking the relevant state's case law.