Captivating, concise, and accessible, this Fourth Edition of Gus Martin's popular text introduces readers to the modern landscape of terrorism. Essentials of Terrorism: Concepts and Controversies covers key foundational topics by defining terrorism and introducing its history and causes, as well as discussing terrorist environments (domestic, international, religious, etc.), tactics, targets, and counterterrorism. The Fourth Edition presents new information regarding homeland security, emerging terrorist movements, gender-selective terrorism, the Internet and terrorism, social networking media and terrorism, religious terrorism, and media coverage of terrorism. It also presents new data, case studies, photos, and maps to show readers the locations of major terrorist activities and the devastation they have caused.