Synopsis Lenski's Theory of evolutionary sociology is very much influenced by the contemporary theory of sociology and anthropology which successfully integrates and synthesizes a variety of theoretical perspectives. In his theoretical analysis, he has raised the important questions e.g., What are the differences and similarities between social and biological evolution? What are the roots of the two perspectives? What is a 'class system'? What are the two 'laws' of distribution? How do they operate? What factors influence the rate of change experienced by a society? What is Lenski's hypothesis on technology, surplus, and inequality? What did his research on this reveal? An how does further economic development affect his findings?