I’m probably the last man on the Bloggernacle to realize that the the great stone which smashes to bits the statue in Daniel is not necessarily just a universal government. The stone is the gospel Kingdom, which is both spiritual and temporal. So it makes as much sense to compare parts of the statue to various churches and dispensations as it does to compare them to empires.
Of course, Daniel says that the head of gold is the Persian empire, not Zoroaster or pre-Exilic Judaism. But lets overlook that.