Greenberg's expression refers to the tendency of humans to process complex events or situations through simplification or division. Greenberg's expression "it's not an unusual human characteristic to reduce the world down to very few elements" refers to the fact that humans have a tendency to simplify or divide complex events or situations to process them more easily. For example, when we must understand mathematics we can divide it into different subareas such as geometry, statistics, arithmetic, algebra, among others. Likewise, these subtopics can be divided into different categories. This allows the human to more easily understand complex elements in a complete way.