Diversity is the fuel of innovation. Global diversity—geographical (national) diversification—is indispensable to develop a true psychological science of human beings, but remains poorly understood. We surveyed 68 top psychology journals in ten subdisciplines and examined global diversity across authors, editors, and ownerships. With a comprehensive and quantitative picture of global diversity from authorships to ownerships, our results expose substantial imbalance across subdisciplines, and indicate that global disparity intensifies along the hierarchy of authors, editors, and journal ownership. Poor diversity and its imbalance is primarily due to the overrepresentation of the US, removing which substantially increases global diversity and eliminates diversity disparity between subdisciplines and between authorships and editorships. Furthermore, journal ownerships and editor-in-chiefs strongly affect global diversity in authorships and editorships. These results provide substantial novel insights into the global diversity of top psychology journals, with implications for a new diversity policy to stimulate the generation of variety.