> Going out on a limb here, but at one point everyone thought the world was flat.
Maybe. More likely, at one point most people weren't concerned with more than the local topography.
> Preaching that the earth is actually round, was seen as a detriment to society. So much so that people got horrifically executed for it.
I won't say definitively that that never happened, but it certainly isn't something that there is any historical evidence I've ever heard of, and it sounds a lot like flat-earth mythology, possibly conflated with (exaggeration of) the actual heliocentrism controversy.
Maybe. More likely, at one point most people weren't concerned with more than the local topography.
> Preaching that the earth is actually round, was seen as a detriment to society. So much so that people got horrifically executed for it.
I won't say definitively that that never happened, but it certainly isn't something that there is any historical evidence I've ever heard of, and it sounds a lot like flat-earth mythology, possibly conflated with (exaggeration of) the actual heliocentrism controversy.
https://en.m.wikipedia.org/wiki/Myth_of_the_flat_Earth