The Federalist Papers · Federalist No. 83 · paragraph 27

It is true that the separation of the equity from the legal jurisdiction is peculiar to the English system of jurisprudence: which is the model that has been followed in several of the States. But it is equally true that the trial by jury has been unknown in every case in which they have been united. And the separation is essential to the preservation of that institution in its pristine purity. The nature of a court of equity will readily permit the extension of its jurisdiction to matters of law; but it is not a little to be suspected, that the attempt to extend the jurisdiction of the courts of law to matters of equity will not only be unproductive of the advantages which may be derived from courts of chancery, on the plan upon which they are established in this State, but will tend gradually to change the nature of the courts of law, and to undermine the trial by jury, by introducing…

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