Published by ete3n on February 13, 2020 n Please utilize the following links or any other source except online encyclopediae. http://ezproxy.umuc.edu/login?url=http://go.galegroup.com/ps/i.do?id=GALE|CX3045300813&v=2.1&u=umd_umuc&it=r&p=GVRL&sw=w&asid=6447ec95dbc52a9133415d84dbfa0c83 http://www.regentsprep.org/regents/global/themes/change/neo.cfm http://www.slideshare.net/UzairGhalib/history-of-human-civilization n