The Federalist Papers · Federalist No. 45 · paragraph 2

Having shown that no one of the powers transferred to the federal government is unnecessary or improper, the next question to be considered is, whether the whole mass of them will be dangerous to the portion of authority left in the several States. The adversaries to the plan of the convention, instead of considering in the first place what degree of power was absolutely necessary for the purposes of the federal government, have exhausted themselves in a secondary inquiry into the possible consequences of the proposed degree of power to the governments of the particular States. But if the Union, as has been shown, be essential to the security of the people of America against foreign danger; if it be essential to their security against contentions and wars among the different States; if it be essential to guard them against those violent and oppressive factions which embitter the…

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