[Forum: legitimacy, expansion, and sustainability of Social and Human Sciences in Public Health. Introduction].

The Forum debates current trends and challenges for teaching and research in this subfield and the prevailing criteria for evaluation of its academic output. The authors wager on the hypothesis that we are currently experiencing a clash between the consolidation of Social and Human Sciences in Public Health (with a well-defined identity, undeniable vigor in their research and proposals, and an important number of practitioners) and a bottleneck in training processes and iniquity and inadequacy in the institutional mechanisms for recognition of merit. The Forum presents four articles. The first, by Minayo, discusses the basic forms of knowledge for this training and those needed to analyze contemporary challenges in a globalized world, besides debating the interfaces and mediations between the biological and the social in a teaching proposal. The second, by Trad, provides a current portrait of the subfield's output. The third, by Deslandes & Iriart, presents theoretical and methodological trends in recently published studies, identifying their gaps and characteristics. Bosi, author of the fourth article, fuels the debate on the criteria for evaluation of academic output in the field and analyzes their consequences. The Postscript, by Nunes, reclaims and updates the debate on the construction of identities in the social and Human Sciences in Public Health.