First day of high school, my teacher kept repeating the same words: History repeats itself. I laughed it off at first, but that was the year I became active in the news and politics. And there I realized everything going on in our current world has gone on before. Germany and Japan built up their nations in post-WWI. We imposed (or I should say tryed to impose) santions and received WWII. Iran and Korea are building rockets and nuclear weapons. We are currently, and unsuccessfully attempting to bargain with them. Will we see WWIII?
Post-WWI, Russia went from a weak nation to a powerful one in a matter of years with communism. Then came the Cold War. Post-WWII, China went from the bullied to the bully. Will they assert hegemony over their neighbors just as Russia did, and ultimately threaten the U.S. as well?
I can think of more, but I'll leave them to your imagination. Just keep up on your history: you may just learn the future.