Robert Zoellick, who has served as the World Bank’s president since George W. Bush appointed him in 2007, is leaving when his term expires in June. The United States traditionally has the power to nominate replacements for the post, but that could be changing.Zoellick noted that his departure coincides with a tectonic shift in the world economy: “The Bank has recognised that we live in a world of multiple poles of growth where traditional concepts of the ‘Third World’ are now outdated and where developing countries have a key role to play as growth drivers and responsible stakeholders.” Throughout his term Zoellick recognized that the developing world has been a huge engine of global growth.The bank plays a less pivotal role today than it once did in providing technical assistance to developing countries, as multilateral organizations of its kind have steadily lost clout. In the past five years alone, Chinese banks have provided $75 billion in loans to Latin America—more than the combined contributions of the World Bank, the IADB, and the U.S. Export-Import Bank.Yet Zoellick proved that, even in a radically global economy, the Bank could still be a force for global good, overseeing innovations based on the shareholders’ mutual interests, such as a major push for transparency.Zoellick leaves the World Bank a strong yet flexible institution. A sharp mind like his shouldn’t rest long at a time of great economic turmoil. Where to next, Mr. Zoellick?