Across Colombia’s Caribbean wetlands, ancient farmers built raised fields and canals that controlled floods, survived droughts, and worked without kings. New research argues La Mojana’s vast hydraulic landscape was powered not by centralized rule, but by organized communities acting together. A Landscape Built SidewaysFrom an airplane, La Mojana does not look empty. La Mojana offers an unusually large answer written directly into the soil. La Mojana’s raised fields survived in the terrain long after the society that built them disappeared.