So much of the discourse around the US and genocide focuses on the sin of omission, the failure of the US to prevent or stop genocide elsewhere. Now that former Guatemalan dictator Efraín Ríos Montt has been found guilty of genocide and sentenced to 80 years in prison—a fact established by a UN truth commission in 1997 but often ignored in the literature on genocide and intervention, which tends to focus on Rwanda and Bosnia—perhaps we can attend to the sin of commission. For the US support for Rios Montt was extensive. I wrote about just a little of it in the London Review of Books in 2004:

On 5 December 1982, Ronald Reagan met the Guatemalan president, Efraín Ríos Montt, in Honduras. It was a useful meeting for Reagan. ‘Well, I learned a lot,’ he told reporters on Air Force One. ‘You’d be surprised. They’re all individual countries.’ It was also a useful meeting for Ríos Montt. Reagan declared him ‘a man of great personal integrity . . . totally dedicated to democracy’, and claimed that the Guatemalan strongman was getting ‘a bum rap’ from human rights organisations for his military’s campaign against leftist guerrillas. The next day, one of Guatemala’s elite platoons entered a jungle village called Las Dos Erres and killed 162 of its inhabitants, 67 of them children. Soldiers grabbed babies and toddlers by their legs, swung them in the air, and smashed their heads against a wall. Older children and adults were forced to kneel at the edge of a well, where a single blow from a sledgehammer sent them plummeting below. The platoon then raped a selection of women and girls it had saved for last, pummelling their stomachs in order to force the pregnant among them to miscarry. They tossed the women into the well and filled it with dirt, burying an unlucky few alive. The only traces of the bodies later visitors would find were blood on the walls and placentas and umbilical cords on the ground.