How would you describe the psychosocial aspects, even undercurrents of the American South?
The novelist Tennessee Williams was very on target, describing the American South in its glories & infamies, even its eccentricities in terms of family, relationships, & the culture. Bring it on!
There's a very good analysis on the four streams that contributed to US culture, like the Scots-Irish that dominate the south and Appalachia, Puritans to NE/Yankee culture, Quakers to the Midlands, and English gentry to what became the landed elite in the South. The southwest is dominated by the Hispanic influence, while California has its own liberal culture.
But the South common culture is dominated by the Scots Irish, which makes it unique in the US, except for Louisiana's French influence.