Vom Geist der Gesetze
In making their arguments, the Anti-Federalists appealed to both historical and theoretic evidence. On the theoretical side, they leaned heavily on the work of Charles de Secondat, Baron de Montesquieu. The Anti-Federalists Brutus and Cato both quoted Montesquieu on the issue of the ideal size of a republic, citing his statement in "The Spirit of the Laws" that: