The history of policing dates back to antiquity, when great civilizations such as Egypt, Greece, and Rome developed the first systems to enforce public order. In the time since, countries have developed modern, efficient, and professional police forces to help catch criminals and impose order in the streets. This guide covers the history and development of policing activity, complementing the story of law enforcement with discussions of the theorists and lawmakers who most influenced its evolution. The text also focuses on the two greatest crises faced by law enforcement today: the rise of terrorism and tensions with racial minorities.