Holocaust: hands down.
While slavery was drawn out over
a longer period of time there is absolutely no comparison in the barbarity, the cruelty and the utter drive to extinguish a whole
Race of people from the planet.
Slavery, while abominable was not about
Extermination.
The Holocaust is most probably the worst
Event against a single people in human history.
Jo
One must keep in mind that in various forms, slavery was a common institution in all countries and empires since the dawn of time. All empires usually took the loser of wars and enslaved them. Since ancient man left Mesopotamia, the Carthaginians, the Greeks, the Romans, etc.... ...slavery has been around forever. Later there were things like indentured servants, people bound to certain lands.It was still slavery though.
When America was born, the founding fathers were men of their times, use to slavery as a common thing. We must give them great credit for their vision, that all men are created equal, and for creating the mechanism which they knew would one day end slavery once the people became enlightened enough.
But the holocaust? That was a single act, a policy, of extermination of an entire ethnic group, for no other reason than their extermination. It was a horror. It was nothing like slavery. They cannot even be compared.