In the long gone past, everyone who bothered to think about the shape of the earth would tell you it was flat. They would say that it you went far enough, you could fall off the edge. Anyone who spoke otherwise at the time was kooky, or worse, was a heretic. Then some people, who thought they were smart, made the claim that the earth was a round globe. They argued their point until most people believed it, and they pointed to the images of the earth seen from space. The flat earth types thought the images were fake but were then labeled the kooky ones.
Now we are being told that the global earth view is wrong. Some people, who think they are smart, tell us that the earth is really a giant round fishbowl. In their view, the fish are being crowded out and humans are being crowded in so much as to threaten all life in the fishbowl. Who would have believed it!