This has been an issue throughout history and during the past couple of centuries that control has largely gone underground—at least in the first world nations—exerting its influence though relationships and political influence; with the direct control through violence largely relegated to those third world countries locked away in the darkness.
The situation in Mexico has become different, and this article from the Wall Street Journal examines it.
An excerpt.
“A murder in the Mexican state of Chihuahua last week horrified even hardened crime stoppers. Police Commander Martin Castro's head was severed and left in an ice cooler in front of the police station in the town of Praxedis with a calling card from the Sinoloa drug cartel.
“According to Mexico's attorney general, 6,616 people died in drug-trafficking violence in Mexico last year. A high percentage of those killed were themselves criminals, but many law enforcement agents battling organized crime were also murdered. The carnage continues. For the first 22 days of this year the body count is 354.
“President Felipe Calderón began an assault on organized crime shortly after he took office in December 2006. It soon became apparent that the cartels would stop at nothing to preserve their operations, and that a state commitment to confrontation meant that violence would escalate.
“As bad as the violence is, it could get worse, and it is becoming clear that the U.S. faces contagion. In recent months, several important American voices have raised concerns about the risks north of the border. This means there is hope that the U.S. may begin to recognize the connection between American demand for prohibited substances and the rising instability in Mexico.
“The brutality of the traffickers is imponderable for most Americans. Commander Castro was not the first Mexican to be beheaded. It is an increasingly popular terror tactic. Last month, eight soldiers and a state police chief were found decapitated in the state of Guerrero.”