The historic Isaiah ben Amoz lived in the Kingdom of Judah during the reigns of four kings from the mid to late 8th-century BCE. During this period, Assyria was expanding westward from its origins in modern-day northern Iraq towards the Mediterranean, destroying first Aram (modern Syria) in 734–732 BCE, then the Kingdom of Israel in 722–721, and finally subjugating Judah in 701. Proto-Isaiah is divided between verse and prose passages, and a currently popular theory is that the verse passages represent the prophecies of the original 8th-century Isaiah, while the prose sections are "sermons" on his texts composed at the court of Josiah a hundred years later, at the end of the 7th century.