tool than the communist party's official model for analyzing and understanding the realities of social inequality in their societies, while at the same time providing a useful tool for challenging an increasingly unacceptable Communist social order. See also Kardashev scale Gerhard Lenski References External links Gerhard Lenski's Ecological-Evolutionary Social Theory People from Washington, D.C. 1924 births 2015 deaths American military personnel of World War II American people of German descent American sociologists Neoevolutionists Theoretical historians University of North Carolina at Chapel Hill faculty Yale University alumni