Sapelo Island contains thousands of years of human history, beginning long before European colonization with Indigenous communities who used its maritime resources and left archaeological sites across the landscape. Spanish mission activity, British expansion, plantation ownership, and warfare successively reshaped the island. In the early nineteenth century Thomas Spalding developed large-scale agriculture, including Sea Island cotton and sugar, on land worked by enslaved Africans whose skills and labor created the wealth associated with the plantation estate.

Enslaved people cleared and cultivated fields, constructed tabby buildings, tended livestock, processed crops, sailed boats, practiced trades, raised families, and sustained African-derived knowledge in a coastal environment. After emancipation, descendants established communities including Hog Hammock, Raccoon Bluff, and Shell Hammock. Land purchase, kinship, worship, farming, fishing, basket traditions, language, and foodways supported Gullah-Geechee life. Many settlements later declined or disappeared, making cemeteries, archaeology, oral histories, and family-owned parcels crucial evidence.

Wealthy industrialist Howard Coffin acquired much of Sapelo in the twentieth century, adapted the former plantation-house site, and promoted agriculture, roads, and resort-style use. Tobacco heir R. J. Reynolds Jr. later owned the island and remodeled the mansion, while supporting research that contributed to the University of Georgia Marine Institute. State acquisition eventually brought large areas into conservation management. These transitions preserved habitat but also concentrated ownership and changed access, employment, housing, and community relationships to land.

The Reynolds Mansion is a restored twentieth-century residence built over earlier foundations, not an intact Spalding plantation house. Hog Hammock remains a living Gullah-Geechee community and National Register district, not an outdoor museum. Residents have faced population loss, rising costs, development pressure, zoning disputes, limited services, and dependence on ferry access. Heritage programs should respect private property, community authority, and living cultural practice rather than treating residents as attractions within a state-managed landscape.

Sapelo is significant for Indigenous history, slavery, Gullah-Geechee survival, plantation agriculture, elite ownership, marine research, and coastal ecology. Interpretation should be led with descendant communities and distinguish the mansion's periods from plantation history. Conservation must address hurricanes, sea-level rise, erosion, wildfire, salt, cemeteries, archaeology, vernacular buildings, habitat, ferry capacity, and equitable access. Protecting culture requires more than preserving structures: it requires conditions that allow Hog Hammock residents and descendants to retain land, sustain community life, and determine how their history is represented. Research agreements should ensure that archaeological data, recordings, and family information remain accessible to the people whose heritage they document. State conservation and ecological science will be strongest when the island's resident community is treated as a governing partner rather than another resource to be managed.