Herbert Spencer described human society as a complex system having much in common with the human body.
Explanation:
Herbert Spencer believed that the way the human body evolved to be the way it is in today's date, is the same way the society evolves. He referred to the process of biological evolution to explain social evolution.
He proposed that as the Darwin theory elaborates on how the development of living organisms started from a simple unicellular organism turning into a multi-cellular organism, the evolution of the society started from individuals simply coming to live together.