Between XVI and XVIII centuries, radical breakthroughs took place in all spheres of knowledge, especially in that of natural science, starting with the works of Linné and Buffon. The old system of correspondences between microcosm and macrocosm based on mythology was replaced by an effort to put the whole world in a system. In that period, the idea of difference took on its modern meaning of a logic operator that serves to measure, evaluate, sanction and mark a distance with reference to a norm or to a system of rules.
   

Today, the working of the difference is evident in the field of social questions. Applied to human intelligence, it is a tool that claims to measure the IQ (Intelligence Quotient) of an individual with the help of a culturally oriented test. It places the individual on a scale of values, sanctions him by offering or refusing access to a social function and designates him as brilliant, normal or limited. But this almost clinical procedure appears to be more and more systematically counterbalanced by utopian speeches of the type "we are all different, but equal". They tend to confuse the desire for equality with the reality we live in, which is increasingly selective and unequal. It is precisely this difference that the team MEN analyzes as a priority during seven days of modern genesis which evokes social creation of inequality. This matter ends in a risk of disintegration of the sense linked to a new breakthrough - that of an inexorable shift towards virtual society.