Geographer Danny Dorling has written a number of books on social justice, inequality and most recently, "A Better Politics, how government can make us happier."
Creating Maps that help us visualize population mass, energy usages, and (below) ancient migratory patterns he offers a set of fascinating keys that helped me understand how the world has changed and continues to evolve. The Ted Talk is well worth 15 minutes of your time. (link below)
Robin is a Portland, OR native who's lived long enough to remember the transformative era