<span>they lived in caves or rough tent like structures .
the shelters were temporary because hunter/gatherers were nomads.</span>
As the early 1900's was still a religious period, many people had discontent with that theory because they thought it damaged the origins of the bible, and public morality.
Self Interest is the motivator of economic activity (rephrase the answer)
The answer is Julien Offray de La
Mettrie. He <span>was a French doctor and philosopher,
and one of the earliest of the French materialists during the Enlightenment. He is best acknowledged for his
book called L'homme machine. It also known as Machine Man or The Human
Mechanism in English.</span>
