Niall Ferguson: "My time in England now feels like a detour"

The Harvard historian Niall Ferguson never pauses for breath. In March, Channel 4 is showing his series on the ascent of China; in the meantime, he is completing a magnum opus on Henry Kissinger. Alan Philps catches up with him in Oxford to talk about being Scottish, the game of Russian roulette being played in the US Congress and why he is quitting England for America