TLDR; The Peelian principles are a set of nine policing principles developed by Sir Robert Peel in 1829, which laid the foundation for modern law enforcement.

TLDR; The Peelian principles are a set of nine policing principles developed by Sir Robert Peel in 1829, which laid the foundation for modern law enforcement. These principles are still relevant today and provide a code of ethics and conduct for police officers. The following are the nine Peelian principles: The basic mission for which the police exist is to prevent crime and disorder. The ability of the police to perform their duties is dependent upon public approval of their existence, behavior, conduct, and the willingness of the public to cooperate with them. Police must secure the willing co-operation of the public in voluntary observance of the law to be able to secure and maintain the respect of the public. The test of police efficiency is the absence of crime and disorder, not the visible evidence of police action in dealing with it. Police seek and preserve public favour not by catering to public opinion but by constantly demonstrating absolute impartial service to law. Police use physical force only when necessary, exercising restraint in such use and using only the minimum degree of physical force necessary in any particular circumstance. Police, at all times, should maintain a relationship with the public that gives reality to the historic tradition that the police arethe public and that members ofthe publicarethe police. Police should always direct their action strictly towards their functionsand never appear to usurpthe powersofthe judiciary. The test of police effectiveness is not measured by individual officers or units but rather by how effectively society is brought into accord with its laws through its members’ voluntary compliance with them as well as by efficient enforcement where necessary