Complex sentence: Geertz's research and ideas had a strong influence on 20th century academia, including modern anthropology and communication studies, and for geographers, ecologists, political scientists, scholars of religion, historians, and other humanists.
Split into simpler sentences: Geertz's research and ideas had a strong influence on 20th century academia. Aside from his influence on anthropology, Geertz' landmark contributions to social and cultural theory were also influential for geographers, ecologists, political scientists, scholars of religion, historians, and other humanists.