What agrument's did opponents of annexing foreign territories present?

Opponents of annexing foreign territories argued that such actions contradicted the principles of self-determination and democracy, as they often disregarded the wishes of the local populations. They raised concerns about the moral implications of Imperialism, suggesting it was unjust to impose control over other nations. Additionally, critics warned about the potential for increased military conflicts and the financial burden of governing and integrating new territories into the existing political and economic systems.