Columbia subject headings:
Galapagos Islands--Politics and government.
Galapagos Islands--Social conditions.
Natural history--Galapagos Islands.
Harvard subject headings:
Biology--Social aspects--History--19th century.
Darwin, Charles, 1809-1882
Galapagos Islands--History--19th century.
Science--Social aspects--History--19th century.
Princeton subject headings:
Galapagos Islands--History.
Galapagos Islands--Social conditions.
Social Darwinism--Galapagos Islands.