There was much they did not know or understood imperfectly: that the American population, now 2.5 million, was more than doubling every quarter century, an explosive growth unseen in recorded European history and fourfold England’s rate; that two-thirds of white colonial men owned land, compared to one-fifth in England; that two-thirds were literate, more than in England; that in most colonies two-thirds could vote, compared to one Englishman in six; that provincial America glowed with Enlightenment aspiration, so that a city like Philadelphia now rivaled Edinburgh for medical education and
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