Claim: The U.S. should not have expanded its territories in the late nineteenth and early twentieth centuries because such expansion often resulted in violence and oppression rather than true peace.
Evidence: The text states, "While we had a frontier the chief feature of frontier life was the endless war between the settlers and the red men," highlighting that expansion led to conflict and suffering for indigenous populations. Additionally, the author argues that the promise of peace through expansion is misleading, as shown when it mentions, "We should merely turn them over to rapine and bloodshed until some stronger, manlier power stepped in," which suggests that expansion does not guarantee stability or order.