The Spirit of the Laws
A major aspect of Federalist No. 9 is Hamilton's response to the common Anti-Federalist argument based on the theories of Montesquieu, who wrote famously in his "The Spirit of the Laws" that "It is natural for a republic to have only a small territory; otherwise it cannot long subsist." The Anti-Federalist took his arguments to mean that the federal Union was bound to fail. Hamilton responded that if Montesquieu were taken literally, then since he was thinking of dimensions far smaller even than those of the states, the Americans would have to split themselves into "an infinity of little, jealous, clashing tumultuous commonwealths."