Since the end of World War II, the number of wars between states has declined significantly, but the number of intrastate civil conflicts – as seen in Syria and Afghanistan – has increased.

I’m planning a road trip and I want to know what to pack. I could rely on what I’ve learned from past trips or what it looks like out the window right now, but what would really help are a weather forecast and a guidebook telling me what I might expect. It’s no guarantee against a wrong turn or two, but it will certainly better prepare me for the road ahead and help me take advantage of opportunities along the way.