Definition: Diffusionism is a philosophical and political movement that emerged in the 19th century in Europe. It was characterized by a focus on the role of individuals, rather than institutions or systems, in shaping society. Diffusionists believed that human behavior could be understood through an examination of individual actions and decisions, rather than through impersonal social structures. The concept of diffusionism is often associated with the work of Jean-Jacques Rousseau, who argued that individuals are responsible for their own happiness
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