New Books In National Security

From the Taliban to Hezbollah, armed nonstate actors and civil warfare have dominated the US national security debate for much of the last 20 years. Yet, most analysis shares a critical underlying assumption: that non-state actors fight very differently than states do. In Nonstate Warfare: The Military Methods of Guerillas, Warlords and Militias (Princeton UP, 2021), Dr. Stephen Biddle argues that those ideas are not just misleading but dangerous. Through a careful review of five nonstate actors, Dr. Biddle shows that state and nonstate military methods vary more by degree than by kind. Still, degrees do matter. To predict how “conventionally” or “unconventionally” a nonstate actor will fight, Dr. Biddle develops a theory reliant on two key variables: the stakes leaders perceive in a conflict and the strength of a nonstate actor’s institutions. The greater either variable, the more that actor will fight like we expect states to: defending and seizing ground, concentrating forces, employing heavy weapons, and