2011 has been a year of sweeping changes in leadership worldwide. The Arab Spring meant the end of decades-long dictatorships across the middle east, and now threats of default have forced Greek Prime Minister George Papandreou and Italian Prime Minister Silvio Berlusconi to resign. As the European debt crisis continues to unfold, more changes--including a shift which countries step up to deal with these problems--are assuredly ahead. Leslie Gelb, president emeritus of the  Council on Foreign Relations, tells The Takeaway what may be in store for the continent and what it could mean for China and the United States.