Who, when, where
Deuteronomy is presented as Moses's last words to Israel, delivered on the Plains of Moab just before his death and Joshua's crossing of the Jordan. The English name comes from a Greek phrase meaning "second law," because much of the book restates the laws given at Sinai for a new generation. Jewish and early Christian tradition credits Moses; the book itself names Moses as the speaker and reports his death in chapter 34. Most modern scholars see a long editorial history: a core associated with the law book found in the temple under King Josiah in 622 BC (2 Kings 22), shaped further during the exile, and read backward across the rest of the historical books. The setting is tight. One man, one camp, one stretch of days east of the Jordan within sight of the land.
Where in history
End of the Wilderness Generation
Moses's farewell on the Plains of Moab
- 1446 BC
Exodus from Egypt under Moses
Traditional early date. A substantial minority of scholars place the exodus around 1280 BC under Ramesses II.
- 1406 BC
Moses delivers Deuteronomy on the Plains of Moab; dies on Nebo
The whole book is set in the days before Israel crosses the Jordan. Joshua takes over within the same year.
- 622 BC
Book of the Law found in the temple under Josiah
Most scholars identify the law book Hilkiah finds (2 Kings 22) as a form of Deuteronomy. Josiah's reform turns on it.
The amber span: Deuteronomy: Moses's three sermons.
The big idea
Moses gives three sermons before he dies. The first looks back: he retells the 40 years in the wilderness so the new generation knows what their parents did and what God did. The second is the heart of the book: he restates the Ten Commandments, then unpacks them across roughly 22 chapters of practical law, from food and warfare to debts and tithes, to a king Israel does not yet have. The third sermon lays out a choice: blessings if Israel keeps covenant with God, curses if it does not. He writes the law down, names Joshua as successor, sings a final song, blesses each of the twelve tribes, and dies on Mount Nebo with the land in view but never entered. The book reads like one long sermon shaped by the question, what will you do when you finally have the thing you have been promised.
Why this book still matters
Deuteronomy is the most quoted Old Testament book in the New Testament. Jesus's first recorded words after his baptism are three quotations from Deuteronomy 6 and 8, used to answer the devil in the wilderness (Matthew 4). "Hear, O Israel: the LORD our God is one LORD" (Deuteronomy 6:4, the Shema) is the verse Jesus names as the greatest commandment, paired with the love-your-neighbor line from Leviticus. The book also gives the Bible its framework for thinking about loyalty: God chose Israel not because they were big but because he loved them and kept his promise to their ancestors. The narrative books that follow (Joshua through 2 Kings) are written through a Deuteronomy lens, judging each king by whether he kept this law. Across the Old and New Testaments, this is the book that shows up under almost every other one.
Deuteronomy 8:3
“And he humbled thee, and suffered thee to hunger, and fed thee with manna, which thou knewest not, neither did thy fathers know; that he might make thee know that man doth not live by bread only, but by every word that proceedeth out of the mouth of the LORD doth man live.”
Matthew 4:4
Jesus's first recorded word after his baptism, answering the devil who tells him to turn stones into bread: "It is written, Man shall not live by bread alone, but by every word that proceedeth out of the mouth of God." All three of his replies in the wilderness come from Deuteronomy.
Honest about what's debated
Three honest questions readers still ask. First, when was it written? The traditional view assigns the bulk to Moses around 1400 BC. Most modern scholars connect it to the law book found in the temple in 622 BC under Josiah, with earlier material woven in. The lens through which Joshua, Judges, Samuel, and Kings get told is so consistent with Deuteronomy that scholars call those books, taken together, the Deuteronomy-shaped history. Second, what to do with the warfare commands. Deuteronomy 7 and 20 instruct Israel to dispossess the Canaanites entirely. Readers from Augustine forward have struggled with how to read these passages. Modern responses range from a strict-historical reading to arguments that the rhetoric is hyperbolic war language standard across the ancient Near East. Third, the blessings and curses in chapters 27-30 read so accurately as a description of the exile that some scholars argue chapters 28-30 reach their final form in light of 586 BC. The text itself frames them as Moses's prophecy.
Deuteronomy is 34 chapters. Start with chapter 6 (the Shema), or chapter 30 for the choice between life and death.