In the face of seemingly weekly terrorist attacks and reports that Islamic State affiliates are growing in number, political leaders are under pressure to take tougher action against ISIS and other violent extremist threats. Removing terrorists from the battlefield and from streets remains critical—President Obama announced last week that the United States will send 250 more special operations forces to Syria, for one, and other military, intelligence, and law enforcement efforts will be important. According to one assessment, the United States has spent $6.4 billion on counter-ISIS military operations since August 2014, with an average daily cost of $11.5 million. As a result of these and related efforts, the territory the Islamic State controls has been diminished and its leadership and resources degraded.

Perhaps even more promising, new prevention-focused CVE networks designed to connect and empower sub-national actors—often with funds, but not instructions, from Western donors—are now in place. These platforms can pool limited resources and focus on connecting and training the growing number of young people and women working in this area –

The more challenging task, however, may be preventing individuals from joining the Islamic State or future groups in the first place and developing, harnessing, and resourcing a set of tools to achieve this objective. Violent extremism is most likely to take root when communities do not challenge those who seek to radicalize others and can’t offer positive alternatives. Prevention is thus most effectively addressed by the communities themselves—mayors, teachers, social workers, youth, women, religious leaders, and mental health professionals—not national security professionals, let alone national governments. But it’s easier said than done for national governments to empower, train, and resource those communities.

Political leaders around the globe are increasingly highlighting community engagement and the role of communities more broadly in a comprehensive counterterrorism strategy. States, however, continue to struggle with how to operationalize and sustain these elements of the strategy.