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Monogenism or sometimes monogenesis is the theory of human origins which posits a common descent for all humans. The negation of monogenism is polygenism.This issue was hotly debated in the Western world in the nineteenth century, as the assumptions of scientific racism came under scrutiny both from religious groups and in the light of developments in the life sciences and human science.
The theory of degeneration found its first detailed presentation in the writings of Bénédict Morel (1809–1873), especially in his Traité des dégénérescences physiques, intellectuelles et morales de l'espèce humaine (Treatise on Degeneration of the Human Species) (1857). This book was published two years before Darwin's Origin of ...
Recent theories have given rise to labels such as the naturalistic and materialistic body. The former, which sociologist Chris Shilling advocated, focuses on the idea that there is a biological explanation and basis for human behavior. [16] This is demonstrated in the suggestion that human behavior is explained by and encoded within the gene. [14]
In paleoanthropology, the recent African origin of modern humans or the "Out of Africa" theory (OOA) [a] is the most widely accepted [1] [2] [3] model of the geographic origin and early migration of anatomically modern humans (Homo sapiens).
The history of evolutionary psychology began with Charles Darwin, who said that humans have social instincts that evolved by natural selection.Darwin's work inspired later psychologists such as William James and Sigmund Freud but for most of the 20th century psychologists focused more on behaviorism and proximate explanations for human behavior.
The theory held that "lower" animals are generated by decaying organic substances. Aristotle stated that, for example, aphids arise from dew on plants, flies from putrid matter, mice from dirty hay, and crocodiles from rotting sunken logs. [16] The basic idea was that life was continuously created as a result of chance events. [17]
To classify what should be included in modern human behavior, it is necessary to define behaviors that are universal among living human groups. Some examples of these human universals are abstract thought , planning, trade, cooperative labor, body decoration, and the control and use of fire.
Human behavior is the potential and expressed capacity (mentally, physically, and socially) of human individuals or groups to respond to internal and external stimuli throughout their life. Behavior is driven by genetic and environmental factors that affect an individual.