While neighborliness, networks of families and friends, informal groups, volunteer participation and civic dialogue are the foundations of civil society, formal organizations are often the building blocks and nonprofit organizations and institutions require financial support to fulfill their missions. The nonprofit sector is affected both by the assets of foundations and by revenues from the public sector. In constrained economic times, declines in philanthropic assets and giving or declines in tax revenues can affect the nonprofit sector profoundly. The third leg of the stool of public support for nonprofits is individual philanthropic giving and individual support through volunteering - both important aspects of social capital. Most nonprofits cannot rely on any one leg of their financial and community support and seek a variety of sources to diversify their funding base.