The geography of science

Scientific activity has historically been concentrated in a small number of advanced economies, but the global landscape of research is undergoing rapid transformation. Using data on 44 million publications from 1980 to 2022, this column examines how the geography of science has evolved along three dimensions: where research is produced, what topics it studies, and where it is consumed through citations. It documents a substantial shift in scientific production from traditional Western leaders s emerging economies. Yet scientific attention and knowledge diffusion remain uneven, revealing a tension between the global expansion of scientific capacity and the continued fragmentation of the knowledge system.