Sovereignty is not a belief central to Calvinism or even Christanity. It is an essential belief to theism - the belief in a God. However, if your god is not sovereign, then your god is no god at all. Tbe Bible spells out in overwhelming proof that the God of Abraham, Isaac, and Jacob is indeed sovereign over the cosmos, the natural order, history, the kingdoms of this earth, coincidences, angels, Satan, and life and death.