1) Symbolic interactionism is based on several key principles including that human thought is shaped by social interaction and that people learn meanings and symbols through social interaction. 2) George Herbert Mead was an important founder of symbolic interactionism and focused on how the self and society develop through social interaction, language, and assuming the perspective of others. 3) Mead believed that the capacity for thought begins with gestures that develop into language, allowing people to understand different perspectives and imaginatively rehearse actions. This gives rise to the "I" and "me" components of the self.