Why do some People Think the World is Flat?

 https://www.youtube.com/watch?v=IwJzsE8CvzQ 

Neil Tyson Demonstrates Absurdity of "Flat Earth" https://www.youtube.com/watch?v=hLPPE3_DVCw

Flat Earthers vs Scientists https://www.youtube.com/watch?v=Q7yvvq-9ytE  

Is Earth Actually Flat? https://www.youtube.com/watch?v=VNqNnUJVcVs  

For some, All the World is like a flat stage, but for others, it might be part of Many-worlds inside a Multiverse. https://thereader.mitpress.mit.edu/the-many-worlds-theory

https://www.poetryfoundation.org/poems/56966/speech-all-the-worlds-a-stage

Benedict Cumberbatch - All The World's A Stage - The Seven Ages Of Man https://www.youtube.com/watch?v=0178jo7Mka0 , https://www.youtube.com/@ShakespeareNetwork/videos 

https://en.wikipedia.org/wiki/Doctor_Strange_(2016_film) 

https://en.wikipedia.org/wiki/Doctor_Strange_in_the_Multiverse_of_Madness 

https://www.reddit.com/r/MarvelStudiosSpoilers/comments/1p9u80u/benedict_cumberbatch_on_being_creatively_involved/ 

https://www.reddit.com/r/AskScienceDiscussion/comments/6hndcg/many_worlds_theory_vs_multiverse_theory/ 

https://www.scientificamerican.com/article/heres-why-we-might-live-in-a-multiverse/ 

https://www.reddit.com/r/AskPhysics/comments/12jqul2/how_plausiblenonplausible_is_the_multiverse_theory/

https://www.ucdavis.edu/blog/new-thinking-about-multiverse