Daniel 2:39

“And after thee shall arise another kingdom inferior to thee, etc.] This is the kingdom of the Medes and Persians, signified by the breasts and arms of silver, an inferior metal to gold; this rose up, not immediately after the death of Nebuchadnezzar, but after his successors, when Belshazzar his grandson was slain, and Babylon taken by Cyrus; now though this monarchy was as large at the first as the Babylonish monarchy, nay, larger, as it had Media and Persia added to it, new conquests made by Cyrus, and was as rich and as opulent in his times; yet in later kings it shrunk much, in its peace and prosperity, grandeur and glory, as in the times of Cambyses and the Magi; and especially in the…”

“That Medo-Persia is the second kingdom appears from Dan 5:28 and Dan 8:20. Compare Ch2 36:20; Isa 21:2. inferior--"The kings of Persia were the worst race of men that ever governed an empire" [PRIDEAUX]. Politically (which is the main point of view here) the power of the central government in which the nobles shared with the king, being weakened by the growing independence of the provinces, was inferior to that of Nebuchadnezzar, whose sole word was law throughout his empire. brass--The Greeks (the third empire, Dan 8:21; Dan 10:20; Dan 11:2-4) were celebrated for the brazen armor of their warriors. JEROME fancifully thinks that the brass, as being a clear-sounding metal, refers to the…”

“And after thee - This must mean “subsequently” to the reign, but it does not mean that the kingdom here referred to would “immediately” succeed his own reign, for that would not be true. The Medo-Persian empire did not come into the ascendency until many years after the death of Nebuchadnezzar. This occurred during the reign of Belshazzar, a grandson of Nebuchadnezzar, between whose reign and that of his grandfather there had intervened the reigns of Evil-merodach and Neriglissar; besides, as the remainder of the prophecy relating to the image refers to “kingdoms,” and not to individual monarchs, it is clear that this also relates not primarily to Nebuchadnezzar as an individual, but as the…”

“Another kingdom - This was that of the Medes and Persians, inferior in time for it lasted not half so long as the Assyrian in prosperity and tranquillity; yet, was this wonderful, rich and large for a time. Third kingdom - This was the Grecian monarchy under Alexander the great, called brass, because coarser than the other. Over all the earth - Alexander marched even to the Indies, and was said to conquer the world. Daniel 2:40”

“2:39 inferior to yours: Silver was inferior in value to gold, as the chest is lower than the head. Nebuchadnezzar was an extremely stable ruler who held the Neo-Babylonian Empire together. Persia, by contrast, was often threatened with internal divisions and instability around the periphery.”

“another kingdom: The empire of the Medes and Persians, whose union was denoted by the breast and two arms of silver; and which was established on the ruins of that of the Chaldeans on the capture of Babylon by Cyrus, bc 538. Dan 2:32, Dan 5:28-31, Dan 7:5, Dan 8:3, Dan 8:4, Dan 8:20, Dan 11:2; Isa 44:28, Isa 45:1-5 another third: The empire of the Macedonians, or "brazen-coated Greeks," aptly denoted by the belly and thighs of brass, founded by Alexander the Great, who terminated the Persian monarchy by the overthrow of Darius Codomanus at Arbela, bc 331; Dan 2:32, Dan 7:6, Dan 7:7, Dan 7:23, Dan 8:5-14, Dan 10:20, 11:3-20; Zac 6:3, Zac 6:6 Daniel 2:40”