Fortunately for us, wise and experienced people from about 100 years ago have left us with many excellent books, so you can make inferences about what is happening and what will happen in the future, and we can act on lessons learned.
I think the theory of offensive realism of geopolitics is pretty representative, but Trump's recent short-term decisions seem to be a bit straying from that theory. This is of great concern to me because it's a topic that could affect the balance of power in East Asia.