The Federalist Papers · Federalist No. 18 · paragraph 15

It appears that the cities had all the same laws and customs, the same weights and measures, and the same money. But how far this effect proceeded from the authority of the federal council is left in uncertainty. It is said only that the cities were in a manner compelled to receive the same laws and usages. When Lacedaemon was brought into the league by Philopoemen, it was attended with an abolition of the institutions and laws of Lycurgus, and an adoption of those of the Achaeans. The Amphictyonic confederacy, of which she had been a member, left her in the full exercise of her government and her legislation. This circumstance alone proves a very material difference in the genius of the two systems.

Publius · Alexander Hamilton, John Jay, James Madison · 1787–1788
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