This is classical conditioning.
The conditioned stimulus is, at first, entering the cafeteria. Later it becomes hearing the lunch bell ring.
The conditioned response is bill feeling hungry.
They play a big role because without writers, we wouldn’t have movies, newspapers, books, or knowledge on how to read.
Perrucci and Wysong in their RN reading "The New American Class Structure" Argue that there are two main classes, the priviledge class, and the working class. Perrucci and Wysong explain how the process of commercial globalization, what they mention to as a super class corporate elite has systematically ruined both the blue collar and the middle class
Greek philosophers believed that the sun, moon, and stars revolved around the earth. This is called Geocentrism, as opposed to heliocentrism, which states that the earth revolves around the sun. They believed that the earth was at the center of the universe.
Also, they believed (ancient greeks) that the motions of the planets were circular and elliptical. It was a widely accepted theory, until Kepler and Copernicus disproved it.
They had a strong belief in Geocentrism.