This document summarizes volunteerism in the United States. It states that about one-fifth of Americans volunteer annually, contributing over 8 billion hours valued at $173 billion. The roots of U.S. volunteerism date back to colonial times, when settlers needed to band together to survive in the wilderness. Neighbors would cooperate by helping each other with tasks like clearing land, building structures, and harvesting crops. The tradition of volunteering remains deeply ingrained in American society today.