So far we have looked at the US nonprofi t sector in the aggregate only. While the nonprofi t sector overall continued to grow through the fi rst decade of the twenty-fi rst century, a closer look at select subfi elds reveals signifi cant variation. Indeed, the impact on the nonprofi t sector of political and economic events in this fi rst decade of the twenty-fi rst century-such as the economic recession of 2008, the creation of an Offi ce of Social Innovation and Civic Participation by the Obama administration, and the expansion of the national community service legislation (Edward M. Kennedy Serve America Act of 2009)—is yet to be determined. One thing is clear: different subfi elds of the nonprofi t sector will be affected and cope in different ways.