(noun) An institution or social practice of owning human beings as property, especially for use as forced laborers.
"Excess of liberty, whether it lies in state or individuals, seems only to pass into excess of slavery."
"You may choose to look the other way but you can never say again that you did not know."
"Whenever I hear anyone arguing for slavery, I feel a strong impulse to see it tried on him personally."
"Those who deny freedom to others deserve it not for themselves, and, under a just God cannot retain it."
"I prefer dangerous freedom over peaceful slavery."