but to answer the OP's question... Flat earth, geocentric belief was the official narrative for most of ancient history and only changing quite recently that there is a galaxy and the sun flies around space with the earth and planets not far behind. and much more recently Bible literalists picked up on the many verses describing the earth as being flat, not a sphere and non-moving. Even more recently mainstream conspiracy culture picked up on the many photo shopped and altered images/videos NASA has released. The moon landing footage that has pretty much been debunked as a set piece filmed by Kubrick (not that we didn't go to the moon, strictly talking the famous footage). and well all this information kind of piled together.. people started doing their own research and their own "testing" and begin to firmly believe one thing, the earth is No globe, at least not in the sense that we have been led to believe. and so many speculate "flat." Either way, if you do the research for yourself you will realize NASA is clearly hiding something and much of the so called "science" does not add up. Oh and how most airline flight patterns make no sense on the globe earth model but on a flat earth mode, the same model on the UN's flag, the flight patterns make perfect sense, because the planes are traveling in straight lines.
It's all very interesting the more and more you look into it. and honestly not quite sure what to make of it. One thing is obvious, the people/organizations who control the world want to remain in power indefinitely, and this is easily done by lies.
I read this book
Worlds Beyond the Poles: Physical Continuity of the Universe by F. Amadeo Giannini
and it made me think.. Yeah, "think" something the people in charge never want us doing, We should only be consuming and believing everything we're told. Right?
Summary on the book. The author worked with the government when they sent up the first rockets with cameras and took photos of the earth at very high altitudes.. and this man previously had a theory on what the earth really was.. well, the photos matched his theory so the gov called him in for an investigation. Soon after, it was hushed up and NASA was formed and well, here we are!