This article intends to show that Plato’s dialectic is a paradigm of complexity. Firstly, it is an approach to reality which is a whole structured in two communicating parts, the sensitive and the intelligible sphere therefore Ideas work as mediators; they are the principle of order of phenomenal plurality. Furthermore, each being is a mix composed of peras and apeiron; it is organized according to a systematic logic; sure enough, it is a whole composed by an endless multiplicity of parts: it is a “orderly disorder”. In addition it is inserted into a set of positive links which mean connection; it is also part of negative links of exclusion, all determined from the pervasiveness of the diversity; this is the reason because only two differen...