Sir Robert Peel established nine principles of policing in 1829, emphasizing the importance of community cooperation in maintaining public safety. He believed that the police should work collaboratively with the community to prevent crime rather than simply responding to it. Peel's principles also highlighted the need for police to gain public trust and respect. He asserted that effective policing relies on the consent of the governed, meaning that the legitimacy of law enforcement comes from the community's support and cooperation. This foundational idea continues to influence modern policing practices today.