Which of the following is an example of how slavery was opposed and combated in the United States in the years leading up to the Civil War (1800-1860)?

Bolivar’s vision for the Americas were for them to be united. He believed that once united America would impress Europe because, “ Who shall oppose an American united in heart, subject to one law, and guided by the torch of liberty.” Bolivar wanted a unified America that would be undefeatable by past and future oppressors.