“Let us remember that the automatic machine is the precise economic equivalent of slave labor. Any labor which competes with slave labor must accept the economic consequences of slave labor.”

“An economy built on slave labor is vulnerable in two ways. One, availability of forced labor discourages technical innovation. The very wealthy [Roman]empire experienced no industrial revolutions. Two -- even more crucial -- slaves do not reproduce their own numbers. As Rome's wars of conquest ended, the slave population began to shrink, leading to a shortage of agricultural laborers by 200 A.D.”

“We must face the ultimate contradiction that our free and democratic society was made possible by massive slave labor.”

“Work and its results always outlived those who labored at it as any Egyptian slave-ghost will tell you.”

“Yes," she said. "'I Been Working on the Railroad.'There's just two things I'm worried about with that: the grammar and the use of slave labor.”

“As long as human labor power, and, consequently, life itself, remain articles of sale and purchase, of exploitation and robbery, the principle of the “sacredness of human life” remains a shameful lie, uttered with the object of keeping the oppressed slaves in their chains.”