[This is the full issue of the first issue of Mɛtascience] -/- This inaugural issue of the journal Mεtascience is also a special issue since it pays tribute to Mario Bunge (1919-2020) to high light his contribution to knowledge and our filiation with his thought. Mario Bunge's project is part of the humanist and scientific tradition of the Enlightenment. At the end of his intellectual journey, he wrote more than 150 books and 540 articles or chapters, including translations into several (...) languages. The work covers almost all branches of philosophy, from ontology to ethics, semantics, episte mology, methodology, praxeology and axiology, as well as a large number of scientific disciplines, ranging from physics to sociology, chemistry, biology and psychology. Without a doubt, Bunge's mag num opus is the Treatise on Basic Philosophy in nine volumes (1974- 1989). The six contributions gathered here come from authors from differ ent backgrounds. Like Bunge's project, they are neither part of the an alytic or continental movement in philosophy. The reader will find studies on the Bungean system, applications of Bungean thought, re flections and testimonies, and metascientific contributions. From the point of view of metascience as theorized in these pages, Bunge is the last of the philosophers and the first metascientific. He kept from philosophy the idea of a complete system that would inte grate semantics, ontology, epistemology, ethics, axiology and praxe ology, but he refused to problematize scientific knowledge in a tradi tional way. The result is surprising: even by accepting science as it is, he finds room for questioning. May Mεtascience be a place of questioning and deployment of the approach designed by Mario Bunge. (shrink)