evidence: These facts show that there were sufficient resources and co-operation to enable large groups to work on these projects. To what extent this was a basis for the development of elites and social hierarchies is a matter of ongoing debate.[61] Although some late Neolithic societies formed complex stratified chiefdoms similar to Polynesian societies such as the Ancient Hawaiians, based on the societies of modern tribesmen at an equivalent technological level, most Neolithic societies were relatively simple and egalitarian.[62] A comparison of art in the two ages leads some theorists to conclude that Neolithic cultures were noticeably more hierarchical than the Paleolithic cultures that preceded them.[63] [...] - ^ Rogers & Semaw 2009, p. 164 - ^ Zimmer, Carl (11 July 2018). "Archaeologists in China Discover the Oldest Stone Tools Outside Africa – Chipped rocks found in western China indicate that human ancestors ventured from Africa earlier than previously believed". The New York Times. Retrieved 13 July 2018. [...] - Schick, Kathy D.; Toth, Nicholas (1993). Making Silent Stones Speak: Human Evolution and the Dawn of Technology. New York: Simon & Schuster. ISBN 978-0-671-69371-8.