Shared ground
Daniel 8:20–22 shifts from symbols to plain identification. The ram with two horns “is” the kings of Media and Persia. The goat “is” the king of Greece. The large horn between the goat’s eyes represents the first king. When that horn is broken, four kingdoms arise from the same nation, but they do not have the same power.
The passage treats horns as a way of talking about ruling power—expressed through rulers and the realms connected to them. It also assumes a real succession in history: one dominant power is replaced by another, and then the second power fragments.
Where interpretation differs
Some readers take “kings” in a strictly personal sense: the horns represent individual monarchs. Others read “kings” more broadly: rulers as stand-ins for entire royal powers or dynasties.
Some readers take “the king of Greece” as one specific person (the first king named right after), while others hear it as “the Greek kingdom,” with the “first king” then being the first major ruler who embodies that kingdom’s rise.
Some read the “four kingdoms” as an exact number of successor states. Others think “four” may summarize a real division into multiple major parts without requiring a perfect one-to-one match with later political maps.
Why the disagreement exists
The same word “king(s)” can refer to a single ruler or to a ruling power represented by its ruler. Also, visions often compress complex political changes into a simplified set of images, so readers differ on how precise the numbers and correspondences must be.
What this passage clearly contributes
Explicitly, the text identifies the animals and key horns with Media–Persia and Greece, then describes a major first Greek ruler whose power ends and is followed by a fourfold division that is weaker than the original unified strength. Theologically inferred from this (without being directly stated here) is that history is not random: empires rise, fall, and fragment in a knowable sequence within God’s overarching control (a theme consistent with the book’s wider message; compare Daniel 2:21).