The first modern psychologist who was primarily interested in understanding the unconscious mind was

I believe the answer is: sigmund Freud

Technically, sigmund Freund was not the one that invented the concept of unconciousness, but he's definitely the one that popularized it. He promote the idea that our actions do not always influenced by the fators that we;re aware of, but the unconcious mind that lies within our state of mind could also influence the way we think without we even realizing it.

уєѕ нє ℓσѕт ¢σитяσℓ σf нιѕ ρυριℓѕ

answer; analytical,creative and practical;