First, you used a logical fallacy as proof. Falsely claiming our ancestors "believed" it was a globe, so we should too. That's not how to use logic.

In reality, the globe wasn't mainstream outside of academia until the 1950s.

Source? Read a book called "the flat earth conspiracy" by Eric dubay.

It's in the first chapter. Flat earth a planted conspiracy for sure. But that's because the earth isn't a globe and they want to make anything that gives people any idea that it's not a globe look so rediculous that's it's not worth looking into. Obviously this psy op has worked on you.

Lastly, the earth being a globe is a theory. So it's you who has to prove its a globe. Then it's easy to see the entire scam fall apart.

You think it makes sense, because we were all indoctrinated before we could even form full sentences. But when you relearn how to think about earth, you'll see how rediculous it is. And it's so obvious that earth is not moving, not floating in space. Giant suns and distract Galaxies are all deception.

Also, I've been around long enough to know you don't prove theory, you test them to see if they hold up. The earth being a globe and moving, is the theory you have to test. So make a test of any kind and see of it hold up. Meaning, see if you can isolate an observation and test that it means the earth is a globe.

Anyway, it for very smart people. Probably over your ability at this stage in your knowledge