In a democratic system I believe the majority of people would vote for a constitution that says no group can enslave another group and that such a "constitution" then can not be changed by 51% majority. In other words protect the rights of minorities.
That's how all democracies work, 51% can't just make any enslavement-law they want. It is still democracy because the constitution that says so was approved democratically.
Democracy is not a single "thing". It is an adjective describing societies. Some have more of it, some less. Not so long ago women couldn't vote, nor blacks. A clear dividing line in current-day politics is that some people seem to think we should have less of it.
That's how all democracies work, 51% can't just make any enslavement-law they want. It is still democracy because the constitution that says so was approved democratically.
Democracy is not a single "thing". It is an adjective describing societies. Some have more of it, some less. Not so long ago women couldn't vote, nor blacks. A clear dividing line in current-day politics is that some people seem to think we should have less of it.