" Any fool can know. The point is to understand." —What does this mean, Albert Einstein?

 "You’ve got to have models in your head and you’ve got to array your experience—both vicarious and direct—onto this latticework of mental models."

—Charlie Munger


We will see the most important ideas of each science. This classification will serve as a tool to order them, and although it is not closed, some will inevitably affect several fields of knowledge. The fact that an idea can be related to several sciences is another sign that knowledge, on its own, is not compartmentalized and we should relearn to appreciate it like that.


That said, it is important to have a mental map of the sciences, from the purest to the humanities. When we use mental models routinely, we must do so starting with the purest sciences—starting from left to right on the below diagram with philosophy, mathematics and physics, as these form the basis of our known world. Thus, this map is not only of classification but of order.


BRANCHES OF KNOWLEDGE

  • Philosophy
  • Mathematics
  • Physics
  • Statistics
  • Engineering
  • Chemistry
  • Biology
  • Psychology
  • Economics
  • History

The deepest questions belong to philosophy, which, as we will see, delves into the unknown. Mathematics is the basis of the known world, the language of nature. From it arise physics, chemistry, statistics, and engineering. From physics and chemistry, biology emerges, which shapes psychology, which in turn explains economic decisions. Finally, we will see history as the collection of facts about the human being throughout their existence.


From the fields of study and their order, we will see the most important ideas. The number of mental models will be 100, as Munger indicated. With them, we can solve and explain 95% of the situations. The important thing is not to know only the names of all mental models, but to actually put them to use. Therefore, the first task is to find a balanced number that allows us to remember them and, at the same time that helps us to have a real vision of the world, helping us make better decisions.


We commonly employ unsuitable data when gauging knowledge—mentioning a lot of books or mental models, for instance read. Following Naval Ravikant's advice: "I'm not interested in reading everything. just want to keep reading the top 100 books."








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