What is the ""myth"" of America's founding according to Howard Zinn?

Myth of the American Founding Fathers, is that the American civil war or revolution was fought for the purpose or on behalf of a united people

Explanation:

In Howard Zinn's book titled "A People’s History of the United States" Zinn depicts American history from the perception of the oppressed, persecuted, powerless, and marginalized people, rather than the usual heroes and elites views.

Hence, among many ways, in which he expressed himself in the book, is him writing about the American Myth of the American Founding Fathers; is that the American civil war or revolution was fought for the purpose or on behalf of a united people, which according to him, it is false, rather, it was fought in favour of the wealthy and elites in the states, so as to protect their interest.

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