"That the earth is a sphere is shown by the fact that as one goes south the stars of the northern constellations appear to sink down, and those of the south to rise higher; and also by the fact that the shadow of the earth, as cast on the moon in eclipses, is circular." (Aristotle, On the Heavens)

Aristotle’s observations are correct and confirmed. He offers 3 good reasons why this planet is a spheroid, and these are discussed below.

The ‘Enlightenment’ based its animus against the ‘Schoolmen’ on the idea that the medieval era ‘slavishly followed’ Aristotle. Unlike the Muslims and Arabs, the European medieval scholars did not. Beginning in the 12th century, Christians translated, analysed, experimented with, and eventually overturned, Aristotlelian physics.

However, some astronomical observations made by Aristotle, or the ‘teacher’, some 2500 years ago, are entirely valid and these informed medieval and early modern astronomy. There is nothing ‘dark’ about that. Use what works. Reject what does not. Given the vast quantity of Aristotle’s work, this analysis does take time.

The Flat Earth question is related to Relativity and some of the topics we have analysed in over 100 posts on the Einstein-fraud. Essentially, much of ‘science’ is about philosophy and the filtering, interpreting and modelling of phenomena through world-views and agendas. The same applies to how Flat Earthers ingest and transform experiential data and observations.  More here