> The Romans also had mechanisms to, in practice, suppress the political power of descendants of slaves; in practice almost all freedmen went into one of the urban tribes (the very wealthy could buy into a rural tribe), making their votes largely irrelevant, for instance. It's reasonable to view New World slavery as a special evil, but Roman slavery was Pretty Bad, too.
Those mechanisms sound a lot like present day gerrymandering[1][2] coupled with redlining[3][2].