Otherness has been taken up from many perspectives as Education, Language, Psychopedagogy, Psychology, Sociology, Anthropology and Philosophy. That's why it is necessary to make a recapitulation of the progress about this topic. When performing this review, it became evident that none of the current perspectives provide a solid base to “the Other's problem”. Due to this, this article aims to track that material base of Otherness, by the social energetic perspective. This is not simple scientific curiosity, since finding that base allows restating the possible ways to interact with the other.