The Byzantine Empire’s long run — 1,100 years — may seem remote from the 21st century, but a reading of its history offers at least three timeless lessons.

The current financial crisis is an entirely political phenomenon, caused by bad regulation and overcome only by the reestablishment of an institutional system based on responsibility and on the assumption of reasonable risk.

From the moment adventurers reached each other's shores in the early 1800s, cultural encounter formed the bedrock of U.S.-Japan ties.

One constant factor in the 14 contests with exit polls is that Mitt Romney has tended to run best among high-income and high-education voters. His leading opponents -- Newt Gingrich in South Carolina and Georgia, Ron Paul in Iowa, New Hampshire and Virginia, and Rick Santorum everywhere else -- have run best among low-income and low-education voters.

The baby boom generation was destined to be powerful culturally, economically and politically because of its disproportionate numbers—and because of its own high self-regard.

Ever since its founding in 1948, the Democratic People's Republic of Korea has maintained an aggressive and bellicose international security posture. Today, fully two decades after the end of the Cold War, North Korea's external defense and security policies look arguably more extreme and anomalous than ever.

President Obama entered the White House determined to renew diplomacy with Iran. During his campaign, he said he would meet the leaders of Iran "without preconditions.”