A scientific theory that is great for discussion is the beginning of the Scientific Revolution, which would be the geocentric theory.
Let’s start by defining what this is. The prefix “geo” means “earth” and the suffix “centric” means “to have a specified center.” Given these definitions, we can conclude that the geocentric theory was about an ideology of Earth being the center of our solar system. That’s exactly what it was. This theory was mentioned and thought of by Ptolemy, who created the first geocentric model of the sun and all other planets orbiting Earth, including the moon. This sparked controversy and the creation of a heliocentric theory, meaning everything was drawn on a model revolving around the sun.