International Security

Contrary to conventional wisdom, states do not typically construct fortified boundaries in response to border disputes or to prevent terrorism. Instead, most build such boundaries for economic reasons, to keep out unwanted migrants from poorer states. Further, Muslim states are more likely to both build and be the targets of fortified boundaries.

Despite a surge of arrests in 2009, evidence suggests that Muslim American terrorist activity—a phenomenon sometimes referred to as “homegrown” terrorism—is not on the rise. The 2009 arrest count is likely a combination of more aggressive law enforcement and an accident of data:  several long-term plots led to arrests in 2009, and many of the plots involved groups, increasing the number of arrests per incident. In addition, many plots have been detected with the help of inside informants.  It is therefore crucial not to overreact to statistics in a way that could alienate the Muslim community.