Precisely. Without history and curiosity, the world is left without context. Without math and logic, it's left without solutions. And, in absence of proper linguistic skills and effective communication, one could have all the knowledge in the world and never be able to use it.  

 I couldn't agree more. Sometimes, I also include political science/civics because they play a fundamental role in modern societies. 

 👆 Fax. But understanding that starts with your foundation in the other three, and so we come full circle 😄