What are you, me, any other person, seeking to learn? The list of 5 is broad and will get you talking in the coffee shop or maybe at a party.
But moving beyond and building the pyramid of knowledge comes from what Marshall and Hawking introduce us to. They want any of us to go further and ask the type of question Wanda S asks below. Read the book, maybe pick up an old Kissinger piece and then reflect on what is being said and done around Ukraine.
Stephen Hawking kept me going as challenged by physics - not my forte but at least able to ask decent questions when next go on a course.
Courses serve different functions from doing the reading list. And this list is a personal intro to far more