In 1960s eastern Bolivia, American researchers hunted the cause of a lethal fever called Black Typhus and traced it to a jungle mouse that thrived after DDT killed the village cats. A few years later, U.S.-trained Bolivian Rangers captured and killed Che Guevara nearby. The episode weighs whether American goodwill in the east made his revolutionary pitch harder to land, as one contested reading among several.
Whether American goodwill from medical work in eastern Bolivia made Che's revolutionary message harder to land is one contested interpretation among several, not a settled fact.