According to the conventional interpretation by the Sages, the Four Kingdoms refer to Babylon, Persia/Medes, Greece, and Rome. Later interpretations extend Rome into Christianity, while others combine Rome with Greece, allowing the fourth kingdom to be Yishma’el - Islam. These interpretations assume that the prophecy ends with a Jewish kingdom in the end of the days and therefore must span throughout human history. An alternative interpretation suggests that the four kingdoms are Babylon, Persia/Medes, Alexander the Great, and the Diadochi kingdom which comprises the Ptolemy and the Selucids, and the dream extends itself to the kingdom of the Hashmona’im. Many prophecies deviate from their initial intentions due to man’s deviation from God’s path, and are destined to be fulfilled in the future.