Isaiah’s message began in the 8th century BCE during the reigns of Judean kings Uzziah, Jotham, Ahaz, and Hezekiah.
The prophet confronted the rising threat of the Assyrian Empire and the moral decay within Judah, calling for social justice and reliance on God rather than political alliances. Isaiah Through the Centuries
Scholars generally divide the book into three sections: "First Isaiah" (chapters 1–39), "Second Isaiah" (40–55), and "Third Isaiah" (56–66), reflecting different historical periods from the Assyrian threat to the post-exilic return from Babylon. Book of Isaiah | Guide with Key Information and Resources Isaiah’s message began in the 8th century BCE