Regional Culture Runs Deep

The differences in adolescent sexuality and family structure we see in "Red State/Blue State" comparisons in the past decade were deeply ingrained already in colonial New England, Pennsylvania, Appalachia and Virginia by the 1770s and have clear British antecedents which have faded to near irrelevance to some extent where they originated. 

By then, 10% of women in the Delaware Valley (New Jersey, Pennsylvania, Delaware and Northern Maryland), 15% of New England women, 30% of women in Virginia and 40% or more of women in Appalachia (one contemporaneous source put the figure as high as 94% in one county) were pregnant when they married. On that wedding day, the average Delaware Valley woman was 24, the average New England woman was 23 years old, the average Virginia woman was 18, and the average Appalachian woman was 19. About 33% of the Delaware Valley women were literate, as were 50% of the New England women, 25% of the Virginia women, and a smaller percentage of the Appalachian women.

From a four year old post at this blog discussing David Hackett Fischer's book Albion's Seed (1989).