This paper shows how social structure shapes many behaviors of low-income Black peoples’ currently labeled “culture.” It refutes both culture of poverty arguments based in welfare dependency and deindustrialization explanations of the post-1960 increase in single-parent Black families. Historically, distinct discrimination experiences in urban versus rural Black enclaves structured distinct child socializations and Black family formations, North and South. Agrarian enclaves socialized conformity to two-parent-families and racist labor markets; urban enclaves socialized resistance to racially stratified labor markets to preserve self-worth, destabilizing families. Any census measure of pre-1960 Black family structure averages low mother-only rates among rural socialized Blacks and high rates among urban socialized Blacks. The 1960-1980 doubling (21% to 41%) of Black children in one-parent families emerged from urbanization converging Blacks toward urban socialized Blacks’ historically high rate. Post-1970 welfare liberalization and/or deindustrialization were exacerbating factors, not causes. Using a family head’s urban/rural residence at age sixteen to proxy socialization location, logistic regressions on 1960s census data confirm hypothesis.