Lev Semiónovich Vygotsky.

Vygotsky is my favorite thinker of the human psychologist development. He was born in Moscow in 1896 and he died in 1934. His parents wanted him to study Medicine, but he always had humanistic ideas and thoughts. Finally, he studied Law, Philosophy and History on Shanyavsky University. After that, in the last period of his life, he studied Medicine, because he wanted to know about the neurological organization of mental superiors functions. In that time, the psychology was in crisis, there was a descriptive side and a physiological side. He wanted to overcome that, so he decided to  investigate about the role of the language on the human behavior and his development on the human life, saying that at first, the words were emotional, after that, they were designations of concrete objects and finally, had abstract meaning.  I like him because he introduced the culture on the study of the psychology. This signifies a very important change in the psychological theory, because it includes a lot of elements and perspectives.