How can psychology transform itself into an inclusive science that engages with the rich cultural diversity of humanity? How can we strive towards a broader and deeper understanding of human behavior that is both generalizable across populations and attentive to its diversity? To address these major questions of our field, relying on scholars from different world regions, we outline first the opportunities associated with conducting psychological research in these and other majority world regions, highlighting international collaborations. Cross-cutting research themes in psychological research in the majority world are presented along with the urgent need to adopt a more critical lens to research and knowledge production within psychology. Indigenization, critical, transformative and liberatory approaches to understanding psychological phenomena framed within the decolonial imperative are presented as future options for a more diverse and equitable psychological science. Next, we address challenges, including limited institutional research infrastructure, limited national investment in research, political and social challenges these regions face, and the impact of imported (rather than locally produced) psychological knowledge. We conclude by offering recommendations to enable psychological science to be more representative of the world’s population. Our aim is to facilitate a broader, better-informed, and more empathic conversation among psychological scientists worldwide about ways to make psychological science more representative, culturally informed and inclusive.