Final answer:
The late 19th-century growth of capitalism in the United States led to imperialism driven by the need for new markets, American economic dominance, and European fears of being economically surpassed.
Explanation:
The growth of capitalism in the late 19th century encouraged United States imperialism by creating a need to obtain new markets for American products.
As the United States became a major manufacturing power, fueled by its natural resources and industrial development, European countries sought to counterbalance this by focusing on territorial acquisition overseas.
This fear of American economic strength was a significant driving force behind European imperialism during this period.
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