This paper aims to discuss understandings of people and the world today. With this aim, an incursion will be made through the traditional perspective of thought and present today. This resulted in indivisible and universal conceptions such as: subject, person and individual. By doing this, we intend to reflect on what man is, starting with questioning clinical practice and in the light of some thinkers, especially HEIDEGGER, with significant input from DELEUZE and SIMONDON. These authors will demonstrate that it is only possible for people lo be understood in their existential or individuated process. Thereafter we reflect on the events of the contemporary world which question the design of today's world, and together with it, the rational values and the hegemony of the autonomous subject who is master of himself and has a clearly defined identity. During the course of the argument, the paper will suggest that this tradition of thought has been inherited from a conception of individuation related to an individual already given, that is to say, already constituted. During the course of developing ideas, the text will indicate that we are, at this turn of the century, being called and challenged to de-construct the ideals from the philosophical tradition of identities and representations. This tradition implies opposite and excluding concepts and is incapable of producing compound, intermediate and complex ideas. As it evolves, the paper seeks to show that the contemporary world offers multiple configurations. People, in this new configuration, must be understood not only as singular, but singular-plural; not just homogeneous but homogeneous-heterogeneous; finally, not just individual-person understood as an essential and indivisible substance, but, mainly, as people who penetrate and are penetrated by the world, in a mutual constitution. Finally, the paper indicates that we need to think together with Edgar MORIN, during the development of this complex thought, when he emphasizes that we need to perform a complete 'conceptual reconstruction' which takes account of this new idea of subject.