Do not make the assumption that without cops there would be no security. Protection and safety are things that people want, and as Skirnir said, the market would provide it. More than likely private police firms would arise and individuals, households, businesses, etc. would pay a monthly premium, much like an insurance premium, for police protection. There would be more than one police firm, and competition between them would ensure that prices were low and services were well received. Meaning, if a cop from police firm A beats down a helpless man in the street, people would cancel their policies and move to police firm B which has a reputation for treating people with kindness. Rather than the power hungry, abusive, taser happy thugs in uniforms we have today, free market police would definitely be accountable to the people they serve. Solid, do yourself a favor and read this book, For a new Liberty by Rothbard, especially chapter 12: Police, Law and the Courts. http://library.mises.org/books/Murra...0Manifesto.pdf