Madison led the charge for a much stronger national system of government. On June 19, he argued that weakness at the core had been the fatal flaw of the Amphictyonic League, opening the way for intervention first by the rulers of Persia, and then, fatally, by Philip of Macedon. He returned to the point two days later, stating that “all the examples of other confederacies prove the greater tendency in such systems to anarchy than to tyranny.”