Federalist No. 6 is an essay by Alexander Hamilton, the sixth of the Federalist Papers. It was published on November 14, 1787 under the pseudonymPublius, the name under which all the Federalist Papers were published. Arguing for the importance of the Union to the well-being of Americans, Hamilton addresses a theme continued in Federalist No. 7: the danger of dissension among the states if they remain without a strong federal government. No. 6 is titled "Concerning Dangers from Dissensions Between the States."
In Federalist No. 6, Hamilton enumerates different instances of hostility among nations, and suggests that should the States remain separate, such hostilities will befall them as well. However, mutual commercial interest will bring the States together and keep them in a peaceful accord. He concludes that nations that exist as neighbors will be natural enemies of one another, unless brought together in a confederate republic with a constitution which will promote harmony through commercial interests rather than competition.