What influential 1890 book criticized American imperialism and expansionism?

The influential book published in 1890 that critiqued American imperialism and expansionism is The Significance of the Frontier in American History by Frederick Jackson Turner. This work posited that the American frontier was a crucial factor in shaping the national character and democratic institutions, while also highlighting the dangers of imperial expansion. Turner argued that the closing of the frontier presented a crisis for American democracy, sparking discussions about the nation's identity in relation to expansionist pressures.

The other choices represent important works as well, but they do not align with the question regarding criticism of American imperialism. The Influence of Sea Power upon History focuses on naval strategies and their impact on international relations. A People’s History of the United States, while offering an important perspective on American history, was published later in 1980 and addresses broader themes of social justice and inequality. The American System, associated with Henry Clay, pertains to economic policies and internal improvements rather than imperial critiques. Thus, The Significance of the Frontier in American History provides a significant critique of the implications of American expansionism during a pivotal time in U.S. history.