John Kerry made his contribution to the bonkers theory by implying that Putin was channeling Napoleon: “You don’t just, in the 21st century, behave in 19th century fashion by invading another country on a completely trumped-up pretext.”

Now that Putin has taken Crimea without firing a shot, and 95 percent of a Crimean electorate voted Sunday to reunite with Russia, do his decisions still appear irrational?

Was it not predictable that Russia, a great power that had just seen its neighbor yanked out of Russia’s orbit by a U.S.-backed coup in Kiev, would move to protect a strategic position on the Black Sea she has held for two centuries?

Zbigniew Brzezinski suggests that Putin is out to recreate the czarist empire. Others say Putin wants to recreate the Soviet Union and Soviet Empire.