Rankings are an inherently dangerous business. Whether offering a hierarchy of countries, cities, or colleges, any such list—at least any such list worth compiling—is likely to generate a fair amount of debate. In the last issue, when we asked readers to vote for their picks of the world’s top public intellectuals, we imagined many people would want to make their opinions known. But no one expected the avalanche of voters who came forward. During nearly four weeks of voting, more than 500,000 people came to ForeignPolicy.com to cast ballots.

Such an outpouring reveals something unique about the power of the men and women we chose to rank. They were included on our initial list of 100 in large part because of the influence of their ideas. But part of being a “public intellectual” is also having a talent for communicating with a wide and diverse public. This skill is certainly an asset for some who find themselves in the list’s top ranks. For example, a number of intellectuals—including Aitzaz Ahsan, Noam Chomsky, Michael Ignatieff, and Amr Khaled—mounted voting drives by promoting the list on their Web sites. Others issued press releases or gave interviews to local newspapers. Press coverage profiling these intellectuals appeared around the world, with stories running in Canada, India, Indonesia, Qatar, Spain, and elsewhere.

No one spread the word as effectively as the man who tops the list. In early May, the Top 100 list was mentioned on the front page of Zaman, a Turkish daily newspaper closely aligned with Islamic scholar Fethullah Gülen. Within hours, votes in his favor began to pour in. His supporters—typically educated, upwardly mobile Muslims—were eager to...