When U.S. Defense Secretary Donald Rumsfeld referred to the "known unknowns" that remained in Iraq in 2002, he was mocked endlessly -- and those mysterious black holes ended up confounding his administration's project there. Rumsfeld's not the only one to encounter this epistemological puzzle: Known unknowns are everywhere, waiting to trip us up. Here are a few of the most enigmatic.
Some of the world's most bitter conflicts have nothing to do with access to resources, ethnic chauvinism, or the balance of power. Here's a short guide to the planet's fiercest gastronomic controversies.
A country's foreign policy is often defined less by its elected leader than its behind-the-scenes operators and elder statesmen. Here are four figures setting the global agenda for the world's emerging powers, just as Henry Kissinger set America's for over 50 years.
Diamonds from African countries have been funding guerrilla wars for decades. But they're not the only precious gems with blood on their hands. Here are four more prized resources that are fraught with conflict.
The Islamic Republic's president and supreme leader may be household names, but many of those in charge of the state's atrocities remain largely unknown outside the country. Here are five of the worst.