"Deep in the heart of the Amazon, the city of Rondon do Pará, Brazil, lived for decades in the shadow of land barons, or fazendeiros, who maintained control of the region through unscrupulous land grabs and egregious human rights violations. They razed and burned the jungle, expelled small-scale farmers and Indigenous tribes from their lands, and treated their farmhands as slaves—all with impunity. The only true opposition came from Rondon’s...