Kierkegaard.
Slavery can never be justified.
I suppose that any Greek philosopher did not say so.
The Philosopher's stone was a magical substance that could turn lead into gold, or was an elixir of life that could make someone immortal.
As far as I know, it was Archimedes..................... but I could be wrong.
You could get it at amazon.com or eBay
Quirinus Quirrell released the troll so he could distract everybody while he tried to steal the Philosopher's Stone.
people have the right to overthrow an oppressive government
Plato
a head
Physiocrat
Aristotle
For the same reason the US justified slavery.