Interestingly, academics have already begun to support international research exchange. Several conferences each year are held around the world to present papers and studies about philanthropy, the voluntary sector, nongovernmental agencies, and volunteering. Few practitioners are involved. Many causes in which volunteers are active have no geographic boundaries. AIDS is a world-wide health crisis.
Environmental issues affect the entire planet.
Hunger and famine require international solutions. One of the powerful things about volunteers is that they are always private citizens. But a volunteer, as a concerned individual, can pack a passport and cross all sorts of geographical and psychological boundaries. By the way, you don't need to leave the country to make use of this unique ability of volunteers to cross formal jurisdictional lines. The United States may have a voluntary sector with more structure and impact than other countries, but every culture has developed ways in which people help people.