" Expansion would break up society “into a greater variety of interests and pursuits of passions, which check each other.” The amalgamation of power would be prevented, making it unnecessary to take government action, either to regulate concentrated wealth or to repress movements organized in opposition to concentrated wealth. “Extend the sphere,” Madison wrote, “and you take in a greater variety of parties and interests,” and you make it difficult for either a mob majority or a tyrannical minority to unite “to invade the rights of other citizens. "

― Greg Grandin , The End of the Myth: From the Frontier to the Border Wall in the Mind of America