In Letter 4, Crevecoeur describes the European men of Nantucket, an island off Massachusetts in the Northeast. He describes how they make their living from fishing, logging, farming, and raising cattle. He describes them as peaceful, not warlike, and not intellectuals, but pragmatic and industrious laborers.
In Letter 6, he moves to Martha's Vineyard and marvels at the peaceful relations between the Native Americans and Europeans. Both groups are classified by what they do: farming or fishing and whaling. There, the Europeans have the ability to co-exist peacefully with indigenous people.
In Letter 9, Crevecoeur moves on to Charles-town, and he describes the men there as hard-hearted because they engage in the slave trade. He details the cruel and miserable conditions that slaves suffer and the insensibility of their masters.
In Letter 11, Crevecoeur turns to Pennsylvania, a prosperous and thriving colony. There, the men are described as educated whether they live in urban or rural areas and are curious about the natural world. They are driven by a desire to learn.
In Letter 12, Crevecoeur describes the "distresses" of the lives of men on the frontiers to the west. They are subject to "the scalping knife" and seeing their wives and children murdered, but at the same time understand that there is a way to adapt and live alongside Native Americans in harmony.