European nations are undergoing rapid and fundamental changes in response to social, political and economic events that are occurring both within and outside the region. These changes are far-reaching in scope and, ultimately, are expected to result in a redefinition of "Europe" and what it means to be "European." Using the author's extensively pre-tested Index of Social Progress (ISP), the research reported in this paper: 1) identifies the major changes in social development that have taken place in 36 European nations since 1970; 2) contrasts Europe's recent social development trends with those of other major world regions ( including Asia, Africa, Latin and North America, and Oceania); 3) using aggregate scores on the Weighted Index of Social Progress ( WISP), identifies Europe's "social leaders" (SLs), "middle performing countries" (MPCs), identifies Europe's "social leaders" (SLs), "middle performing countries" ( MPCs), and "socially least developing countries" (SLDCs); 4) identifies the major development challenges confronting Europe at the outset of a new decade; and 5) provides baseline data against which future developments in the region may be assessed.