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Charles Darwin published the On the Origin of Species, detailing his view of evolution and expanding on the theory of 'Survival of the fittest.'
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The first laboratory of psychology in America is established at Johns Hopkins University.
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Sigmund Freud began performing therapy in Vienna, marking the beginning of personality theory.
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Sir Francis Galton developed the technique known as the correlation to better understand the interrelationships in his intelligence studies.
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The first psychological clinic was developed at the University of Pennsylvania marking the birth of clinical psychology.
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John E. Watson published 'Psychology as a Behaviorist Views It' marking the beginnings of Behavioral Psychology.
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Electroshock therapy was first used on a human patient.
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The state of Connecticut passed licensure legislation for psychologists, becoming the first state to recognize psychology as a protected practice oriented profession.
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Erik Erikson published 'Childhood and Society,' where he expands Freud's Theory to include social aspects of personality development across the lifespan.
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Chlorpromazine (Thorazine) first used in the treatment of schizophrenia.
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The Diagnostic and Statistical Manual of Mental Disorders (DSM) was published by The American Psychiatric Association marking the beginning of modern mental illness classification.
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Abraham Maslow helped to found Humanistic Psychology and later developed his famous Hierarchy of Needs.
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Leon Festinger proposed his theory of 'Cognitive Dissonance' and later became an influence figure in Social Psychology.
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Carl Rogers published 'On Becoming a Person,' marking a powerful change in how treatment for mental health issues is conducted.
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Howard Gardner (professor at Harvard University) introduced his theory of multiple intelligence, arguing that intelligence is something to be used to improve lives not to measure and quantify human beings.
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