The problem of the Ohio mounds examines the enduring mystery of the ancient mound structures located across Ohio, seeking to resolve debates over their origins. The book begins by framing the central question that has sparked widespread curiosity-who constructed these remarkable earthworks? Drawing from detailed analysis and comparative research, the author moves beyond past theories attributing the mounds to unknown or extinct races. Instead, the narrative presents compelling archaeological and cultural evidence to support an indigenous origin, arguing that the mounds were the work of Native American tribes, particularly those who were present at the time of early European contact. The book highlights connections between burial customs, artefact types, and social traditions, positioning the mounds as integral to the history and legacy of the region's original inhabitants. Through methodical argument and scientific inquiry, it counters misconceptions and reinforces the significance of these structures as living testaments to Native American ingenuity and continuity.