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The first school of thought, structuralism, was advocated by the founder of the first psychology lab, Wilhelm Wundt. Almost immediately, other theories began to emerge and vie for dominance in psychology.
Aristotle was the first to classify areas of human knowledge into distinct disciplines such as mathematics, biology, and ethics. Some of these classifications are still used today. As the father of the field of logic, he was the first to develop a formalized system for reasoning.