Who is Sigmund Freud and what made him revolutionary in his field of work?

A psychologist who developed the theory of psychoanalysis and the "unconscious."

Explanation:

Sigmund Freud was one of the first people to study psychology, and he theorized that every thought and action was a result of our unconscious, or memories buried deep below our conscious thinking level.  His practices (predominantly with wealthy women) were considered scandalous at the time, but nonetheless, some still consider him the founder of psychoanalysis.

"the sepoy rebellion was the result of many, many influences and stressors on the cultures of india living under british rule. in britain, it's called the sepoy mutiny on the indian mutiny, but in india, it's called the first war of independence.

the main reason is concerned to the british paramountcy , the belief in british   dominance in india political, economic and cultural life had been introduced in india about 1820."

"they were forced to grow crops that benefited the colonizing nations instead of feeding their own people."

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