Such maps can also help us see the past and present with fresh eyes. For example, any alternate history is not simply a point of divergence, followed by seat-of-the-pants conjecture.

Across pop culture, history is being unraveled and remade. There’s the post-World-War-II dystopia that emerges from a triumphant Nazi Germany in the TV show “The Man in the High Castle ...

In this alternate history version of 1980, Europe was decimated by nuclear blasts in a world where mythology and impossible technologies collide. It’s immediately apparent why developer ...