Sigmund Freud (1 ene 1856 año – 1 ene 1939 año)
Descripción:
 In an indeterminate universe governed by relativity, the one remaining fixed point was the human psyche, but the insights of Sigmund brought this into question a well. Beginning in 1896, the medical doctor from Vienna embarked on research that focused on psychological rather than physiological explanations of mental disorders. Through his clinical observations of patients, Freud identified a conflict between conscious and subconscious mental processes that lay at the root of neurotic (mentally unbalanced) behavior 
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fecha:
1 ene 1856 año
1 ene 1939 año
 ~ 83 years