In recent days, rumblings of ISIS have reached the country with the largest Muslim population in the world. Security forces in Indonesia, which is home to some 200 million Muslims, launched a manhunt for the militant leader Santoso, who had publicly pledged loyalty to the Islamic State. Police arrested several suspected ISIS supporters amid chatter about terror plots, while Australia’s attorney-general warned that the Islamic State was intent on establishing a “distant caliphate” in the Southeast Asian island nation. But the flurry of activity doesn’t tell the whole story about ISIS’s inroads in Indonesia. Consider, for example, that while the number of foreign fighters traveling to Syria and Iraq to join ISIS and other violent extremist groups is estimated to have more than doubled between June 2014 and December 2015, relatively few are coming from Indonesia—at least for now. The question is: Why?