Model of hierarchical complexity is a way of looking at how people think and use information to learn and make decisions. It looks at how our thinking changes as we go through different levels of understanding. It also explains how different levels of understanding help us better understand and manage information. At the most simple level, it suggests that people start off thinking in a very basic way and learn more advanced ideas and concepts in stages. The model suggests that each stage of understanding is more complex than the one before it and this complexity helps us form higher-level thoughts and ideas.