How did the chattel slavery that developed in the Americas differ to previous forms of slavery?

other forms of slavery made the slave an actual person, just forced to do what their master says. chattel slavery basically made the slave more of an abject rather than a living being

labor leaders and organizations had the power to demand it.

explanation:

workers got a five-day workweek because the bcea protects and respect the rights of the employees. labor leaders and other groups demanded it.