The aggravation of the social contradictions of the imperialist era (between monopolies and the leading strata of the nation) at the end of the 19th century gave rise to democratic movements. The league was formed in 1898 to fight the annexation of the Philippines (Burns, 2017). George S. Boutwell became the first president of the Anti-Imperialist League (Burns, 2017). In order to understand why this league claimed territory preservation, it is necessary to understand their motives and views.
First, anti-imperialists claimed that imperialism as a movement was irrelevant to society due to the immorality of its actions. In particular, imperialists neglected other cultures and forced them to follow the American culture. Besides, the advocates of this movement suggested that annexation would be economically burdening since territory separation is a time and finance-consuming process. Finally, the country would become divided because of the defeat.
The anti-imperialists planned to grant the Philippines liberty because they have been fighting for it for a long time. What is more, the movement proponents tried to fight against reelection. They wanted to contribute to the failure of any person or party who voted for annexation (Burns, 2017). In general, Anti-Imperialist League opposed those in power who wished for the Philippines to be cut off from the country.
In summary, I would have felt dubious about the situation since the country is allowed to have freedom. But, on the other hand, after receiving its own independence, the state may be overwhelmed and ruin its societal order. In this way, America could help stabilize the economic and political situation in the Philippines. In addition, they could become reliable trading partners. However, America was not supposed to control the country entirely but only take part in its management.
Reference
Burns, A. (2017). American imperialism: The territorial expansion of the United States, 1783-2013. Edinburgh University Press.