Free households, geography, and focus on free rather than slave population, without neglecting the very important cultural linkages and borrowings across the labor and freedom line.
posted by Lloyd at 11:02 AM
Competitive Exclusion, Slaveholder Hierarchy and Racial Fears
With competitive exclusion, greater marginal cost for small slaveholders in race line -- fragility of circumstance leads to hardening of boundaries.
posted by Lloyd at 11:00 AM