When mankind does have the technology to freely and easily travel to other worlds like Mars who will....?

Who will be in charge of Keeping peace in our own solar system, will we create a outer space task force to watch out for people in space, i mean when we become advanced enough to travel to Mars and beyond who is to say there won't be space jackers ready to steal your spaceship and leave you a drift in space, i think mankind will bring it's preditory nature into space with it, but how will law enforcement be adressed in space?