“The New History of Capitalism is astoundingly popular. Yet the assumption that slavery made a significant economic contribution to America’s development is untenable. Slavery performed exceptionally as a pollutant during its heyday. Instead of energizing the economy, it created an environment that induced stagnation and inefficiency. Left-wing historians are fascinated by slavery, so they should study it objectively. Then they will admit that the unseen costs of slavery exceed its perceived economic contributions.”
You might say that the whole nation suffered as a result of slavery, meaning that the consequences were not endured by slaves alone. The legacy of slavery, then, is universal.