Complete Infidel's Guide to ISIS

ISIS rocketed onto the world stage seemingly out of nowhere, beheading American hostages, bulldozing international borders, routing the American-trained Iraqi army, and carving out a new state that rules eight million people and a territory larger than the United Kingdom.

But who are they?

Where did ISIS come from, and how did they rise to power in so little time?

What is driving them—and how can t...