On its 40th Anniversary SISSA publishes the Manifesto on the Role of Women Networks in Research signed by internationally acclaimed female researchers and delegates of several women networks in science. This is the outcome of the event that took place at SISSA on 9 May 2018 entitled When Women in Science Get Together: the Role of Networks. On that occasion, the participants analyzed the current situation as well as the major challenges and advancements related to the condition of women in science. Special attention was devoted to the relevant work of many national and international projects and associations operating in different disciplines. Female scientist networks represent a strategy to find a tangible solution to the numerical underrepresentation of women in academic research. Their role is of paramount importance and has to be promoted and actively supported.