If we consider human thought as the, so far, ultimate, if not supreme, stage in the evolution of life on Earth, we must also try to understand the evolutionary conditions that allowed it to emerge, and that leads us to look again at living organization.Whatever the origins of life (cf. the text of Jacques Reisse, p. 53), it is clear that the oldest living organization, that of a protobacteria, is extremely complex in its functional and complementary association of extremely diverse (...) macro-molecules, and that this complexity includes in particular: a) the organization of exchanges with an environment from which it draws both matter-energy and organization ; b) a permanent process of self-reorganization through the replacing of molecules that have deteriorated and through the production of new ones; c) the organization of the self-reproduction of the creature through division. An organization of this kind includes a quasi-informational dimension (the hereditary message inscribed in the genes and the capacity to extract information from the environment), a quasi-computational dimension (the processing of data, via indices or quasi-signs from the interior and exterior), and a communicational dimension (internal RNA-protein communication and external communication with its congeners). In short, from the beginning, a living being is the product/producer of a self-eco-organization the nature of which is at the same time computational, informational, and communicational. In other words, within every living organization, there is a cognitive dimension, but this cognitive dimension is undifferentiated within it. (shrink)