He explained: "If your partner bilked you, or a creditor did not pay, or a supplier did not deliver - where did you turn to complain? ...When force became a commodity, there was always demand for it. "Roofs" (krysha) appeared, people who sheltered and protected your business. First it was provided by the mob, then by police, and soon even our own guys realized what was what, and then the rivalry began among gangsters, cops, and the Agency for market share. As the police and the FSB became more competitive, they squeezed the gangs out of the market. However, in many cases competition gave way to cooperation, and the services became gangsters themselves."