The sustainability of societies is an issue of utmost importance for humankind. This is reflected in the 17 Sustainable Development Goals, which highlight the main challenges that citizens face, including underserved groups, and set the path for finding solutions to overcome them. The achievement of the SDGs for 2030 is setting not only the political agenda, but also the scientific one. From the field of social sciences, an issue that remains underexplored is the contributions (or lack thereof, in some occasions) from social theory to the consolidation of more sustainable societies, including the underserved groups. In this vein, the aim of this article is to provide robust evidence on how social theory has contributed to such improvement and is still doing it. To this end, it provides an analysis of how the advancements made from social theory with social impact have contributed to the achievement of the SDGs. Alongside, this article also presents how some theories that never had social impact at their core have hindered the improvement of societies. This dual approach provides a clear picture of the role that social theory can play in the achievement of the SDGs, as well as evidence towards the overcoming of exclusionary theories with no scientific basis.