The authors assert that mega-gifts (defined as $1 million or more) have a powerful impact on American and global society. Using tsunami relief donations as an example, they argue that Americans give more quickly and more generously than those in other countries, where aid is typically pledged by the government using tax funds. Additionally, Americans continuously give to a variety of causes at high levels, not just in times of crisis. The authors dispel a claim that Americans are less philanthropic than citizens of other nations. They also question whether American philanthropy goes where it is most needed.