This book provides a sequencing of the world around us. The book lays a good foundation for the reader by addressing ancient civilizations, kingdoms, middle age, and the emergence of the police system. The book covered England, the United States, France, and the colonial territories such as Africa. The content included critical areas such as police efforts in crime prevention, law enforcement, emergency response, traffic control and road safety, public order, investigation and intelligence, victim support, and community services. Other areas included counterterrorism, national security, police training and professional development, and collaboration with other agencies. The activities of police officers in the process of executing tasks pertaining to all the above areas are thought-provoking and enlightening. The challenges facing policing were not left out. The book addressed technology with examples from different major cities. Of critical importance is the element of homeland security. This element is so vast that a reader would gain a deep understanding of the workings of homeland security, especially with the inclusion of pertinent organizational appendages and stakeholders. The role of this book in academics cannot be overemphasized. The glossary and references will greatly help university teachers and their students comprehend the nuances of homeland security within and outside the police context.