By all means it is to be procured, that the trunk of Nebuchadnezzar's tree of monarchy, be great enough to bear the branches and the boughs; that is, that the natural subjects of the crown or state, bear a sufficient proportion to the stranger subjects, that they govern. Therefore all states that are liberal of naturalization towards strangers, are fit for empire. For to think that an handful of people can, with the greatest courage and policy in the world, embrace too large extent of dominion, it may hold for a time, but it will fail suddenly. The Spartans were a nice people in point of naturalization; whereby, while they kept their compass, they stood firm; but when they did spread, and their boughs were becomen too great for their stem, they became a windfall, upon the sudden. Never any state was in this point so open to receive strangers into their body, as were the Romans. Therefore it sorted with them accordingly; for they grew to the greatest monarchy. Their manner was to grant naturalization (which they called jus civitatis), and to grant it in the highest degree; that is, not only jus commercii, jus connubii, jus haereditatis; but also jus suffragii, and jus honorum. And this not to singular persons alone, but likewise to whole families; yea to cities, and sometimes to nations. Add to this their custom of plantation of colonies; whereby the Roman plant was removed into the soil of other nations. And putting both constitutions together, you will say that it was not the Romans that spread upon the world, but it was the world that spread upon the Romans; and that was the sure way of greatness. I have marvelled, sometimes, at Spain, how they clasp and contain so large dominions, with so few natural Spaniards; but sure the whole compass of Spain, is a very great body of a tree; far above Rome and Sparta at the first. And besides, though they have not had that usage, to naturalize liberally, yet they have that which is next to it; that is, to employ, almost indifferently, all nations in their militia of ordinary soldiers; yea, and sometimes in their highest commands. Nay, it seemeth at this instant they are sensible, of this want of natives; as by the Pragmatical Sanction, now published, appeareth.