For the next half of this series, we will be discussing Human Geography — so we’ll still be looking at the Earth, but specifically, how human activity affects and is influenced by the Earth. Naturally, we thought the best place to start...

I want you to reimagine how life is organized on earth, says global strategist Parag Khanna. As our expanding cities grow ever more connected through transportation, energy and communications networks, we evolve from geography to what he...