This study account~ for the organization of scientific research in nctworb of socio-intellectual tics that bind scientists into a community cultivating the scientific tradition. During the twentieth century the scientific community ha~ become incr ca~ingly global both in the sense that its membership ha~ spread world-widely and in the sense that its long-distance tics have intensified. The globalization of the community and it~ tics ha~ been promot ed by widely institutionalized arrangements, especially through the world's adoption of and belief in several scientific tenets: the universal validity of scientific knowledge, the ownership principle that knowled ge should be the common property of humankind, and the political principle of granting autonom y to scientist~ for forming tics. The community and its network of tics form a hi erarchy with centers attract ing tics from peripheries. During the twentieth century the main center ha~ shifted from Western Europe to North America while Eastern Europe ha~ becom e less central, Ea~t A~ia has become a bit central, and other regions have remained peripheral. A center attracts students from around the world for education, attracts scientist~ for conferences and visit~, attracts deference from scientists throughout the world, exerts pcrva~ivc influenc e, is widely emulated, and is a desired source of recognition . In the global network~ of tics, specifica lly of deference, influence, emulation and desire for recognition, there is an accumulation in the center of tics, both from within the center a~ an enhanced self-reliance and from the periphery as an enhanced centrality, exceeding the research performance at the center.Acknowledgments.