That’s the subject of my just-released TED Talk. And, believe it or not, it used to be an easy question to answer.

If you’re over 45, like me, you grew up in a world dominated by two superpowers. The United States and its allies set the rules on one side of the Berlin Wall, while the Soviet Union called the shots on the other. Nearly every other country had to align its political, economic, and security systems with one side or the other. That was a bipolar world.

If you’re under 45, you came of age after the Soviet Union collapsed. The US became the world’s sole superpower, dictating outcomes both through its dominant role in international organizations and also by exerting raw power. That was a unipolar world. Continue leyendo →