The peace keeper is respected and admired.
Peace keepers are heroes and friends.
Children want to grow up to be peace keepers. People like to help the peace keepers do their job. Peace keepers don't have to be busy, their visible presence discourages violence, that's why they wear uniforms. Since they can be friends to all but the violent they form strong bonds with the people in their communities. People generally join the police because they want to be peace keepers.