The international community has not legally admonished the United States for genocidal acts against Native Americans, yet it is clear that examples of genocidal acts and crimes against humanity are a well-cited page in U.S. history. Notorious incidents, such as the Trail of Tears, the Sand Creek Massacre, and the massacre of the Yuki of northern California are covered in depth in separate entries in this encyclopedia. More controversial, however, is whether the colonies and the United States participated in genocidal acts as an overall policy toward Native Americans. The Native-American population decrease since the arrival of Spanish explorer Christopher Columbus alone signals the toll colonization and U.S. settlement took on the native population. Scholars estimate that approximately 10 million pre-Columbian Native Americans resided in the present-day United States. That number has since fallen to approximately 2.4 million. While this...