The Xalisco Boys, as one cop I know has nicknamed them, are far from our only heroin traffickers. But they may be our most prolific. As relentless as Amway salesmen, they embody our new drug-plague paradigm.

Xalisco dealers are low profile — the anti-Scarface. Back home they are bakers, butchers and farm workers, part of a vast labor pool in Xalisco and surrounding towns, who hire on as heroin drivers for $300 to $500 a week. The drug trade offers them a shot at their own business, or simply a chance to make some money to show off back home — kings until the cash goes. Meanwhile, in the United States, they drive old cars with their cheeks packed like chipmunks’, and dress like the day workers in front of your Home Depot.

The heroin delivery system appeals to them mainly because there is no cartel kingpin, no jefe máximo. It is meritocratic — so unlike Mexico. They are “people acting as individuals who are doing it on their own: micro-entrepreneurs,” said one phone operator for a crew who I interviewed while he was in prison. They are “looking for places where there’s no people, no competition,” he said. “Anyone can be boss of a network.” Thus the system distills what appeals to immigrants generally about America: It is a way to translate wits and hard work into real economic gain.

The money, meanwhile, helps paper over the Mexican small-town animus against drugs, and the guilt many feel at watching their product reduce kids just like them to quivering slaves.

They are decidedly nonviolent — terrified, in fact, of battles for street corners with armed gangs. They don’t carry guns. They also have rules against selling to African-Americans because, as one dealer put it, “they’ll steal from you, and beat you.”

The Boys started out on the fringes of the drug world in West Coast cities. In the late 1990s, they moved east in search of virgin territory. They avoided New York City, the country’s traditional center of heroin, because the market was already run by entrenched gangs. The city still has enormous supplies of dope coming through it, mostly imported now by traffickers from the Mexican state of Sinaloa, and by Dominicans who buy it from Colombians. But New York is no longer the country’s sole heroin hub. They also skipped cities like Philadelphia and Baltimore, where black gangs control distribution.