Prevailing American thinking about substate threats—and more specifically the thinking that shapes U.S. policy—exhibits at least as much of a disconnect between perception and reality as when A Dangerous World? was published six years ago.

Liberalizing legal immigration is the most important component of workable, long‐​term reform.

The Foreign Intelligence Surveillance Court is under scrutiny for its failures to properly check overzealous federal authorities. Republican Senator Rand Paul of Kentucky says the court is not constitutional, but he’s still offering reforms.