Sociologist, expert in issues related to aging and the challenges of a company’s seniorization, Serge Guérin is a professor at the INSEEC Group. He also teaches in the gerontological politics master at Sciences Po Paris. Serge Guérin was the editor of Réciproques, a research journal in proximology. He also worked alongside Minister Michèle Delaunay on a right to rest for caregivers. With the philosopher Pierre-Henri Tavoillot, he shows that the war of the generations which opposes a youth « modern and poor » to seniors « nerds and rich », is a conceived idea and on the contrary the intergenerational link is reinforced in our society .