Describe the United States’ movement from isolationism to expansion-mindedness in the final decades of the nineteenth century

Describe the United States’ movement from isolationism to expansion-mindedness in the final decades of the nineteenth century. What ideas and philosophies underpinned this transformation? What were the results of the Spanish American War?
How did Taft’s “dollar diplomacy” differ from Roosevelt’s “big stick” policy? Was one approach more or less successful than the other? How so?
What were the pros and cons of the United States becoming an imperial power?
The length should be around two pages, double-spaced use standard MLA formatting.
https://openstax.org/details/books/us-history