The significant impotence of science and the contradictions raised by the Corona-virus as current crisis, which unites and reveals inequalities, suggests a scrutiny of the idea of modernity, with relative considerations regarding the social sciences. In fact, the sociological points of approach to the epidemic are diverse. Such as: breaking - with distancing practices – the rituals that define the order of social interaction; as well as like moral panics co-produced by the media and institutions to jointly accept very large sacrifices in terms of individual cost / benefit ratio; the structure and density of social networks as predictors of the spread of infection. The exposition offers some reflections based on dialectics, on the constant tension between the principles of unity and the division around which the social world is constantly being rearranged. The reason for such an approach is that the logic of social order (nomos) implies that any theme, event, or situation can be understood as a temporary point of balance between cohesive and divisive dynamics.