The South was already set back economically before the civil war. The plantation chattel slavery system hampered industrialization in the Southern US very much

The South was already set back economically before the civil war. The plantation chattel slavery system hampered industrialization in the Southern US very much in the same way that the serf-owning nobility system hampered industrialization in the Russian Empire. The South, in turn, ultimately lost the American civil war because the northern states were far more industrialized.