Sparta for all their bluster feared the helots (their slaves) and had culling to keep them down and in fear, much like lynching and whips in the slave owning South. Even with that they still had uprisings. Fear of slaves is part of the tactics slavers use on their culture to allow them to keep being inhumane for profit. Twisted. James Baldwin is a must read for anyone studying civil rights. Few articulate themselves as he did.