He thought some humans were slaves by nature and women were naturally inferior to men.
edit: whoa, I didn't realize how racist this guy was. He could be classified as a eugenicist I suppose.
He also believed in spontaneous generation (fair, without technology we have now it would be really confusing to understand where all kinds of things come from).
Seemed to believe infinity was impossible yet also that the heavens are infinite. Maybe he distinguished between the earthly and heavenly planes, but still seemed to think they were similarly constructed from elements.
The list goes on.
>He thought some humans were slaves by nature and women were naturally inferior to men.
These are unfortunately still all too common beliefs. The latter has mostly been folded into racial essentialism and racial realist beliefs, because slavery is no longer legal (13th amendment loophole notwithstanding) and you can still find people arguing women are intellectually inferior and incapable of rational thought.
The whole anti-DEI movement is based on the premise that non-whites and women categorically don't deserve the same status in the workforce as white men, and the only reason they have "equality" is due to anti-white racism.
many humans are still slaves by nature -- look at how averse many folks in the society are to rational and pragmatic thinking, being enslaved by religion, ideology and showing indifference to human suffering, and endless worship of wealthy.