Secretary of State Rex Tillerson said Tuesday that defeating the Islamic State on the battlefield is not enough, and that the terrorist group will only be defeated by working with other Muslims to ensure ISIS cannot find a foothold in governmental or religious meetings, or even on Muslim social media networks.

“Defeating them on the battlefield will not end this,” Tillerson said in New Zealand. “We have to win this fight in the ideological sense as well, and that means getting into the social media space, getting into the mosque, getting into the majlis, getting into the conversation.”