There are many principles that came with Sir Robert Peel. The purpose of the police force is to prevent as much crime as possible and is to maintain order, the police depend on the trust and approval of the public to do their job correctly and efficiently. Those are his two top ones but there are more principles. He wanted everyone to feel safe when outside or at home. He wanted the public to keep an eye out and watch for the safety of the community. It was all effective in the addition to the principle of policing. His supporters had to make sure that there was a fine line between the professional police and the military.