I'm gambling on "The Oil Age". Political strife will be placed in the context of petroleum geopolitics, energy sectors, climate change, and what will be dubbed "The first migration" (if ocean levels rise as some predict, there will be a second migration for 10% of global population [1])

You can wrap, among other things, the 70's OPEC wars, 79 Iranian revolution, 9/11 and the rise of Trump in a nice tiny bow and create a coarsely accurate depiction of history over those 45 years. You can even have a little side story about things like the 1985 "We Are the World" charity song without missing a beat.

In the long run, things like Facebook and Snapchat will probably be as relevant and well-known as say, the Pacific Mail Steamship Company. Never heard of it? It's a charter member of the Dow Jones Transportation Average (the predecessor to the DJIA) and an important company from the 1800s ...

[1] http://www.huffingtonpost.com/elliott-negin/think-todays-ref...