Polk was a massive supporter for Manifest Destiny, so an encouragement for expansion was something he definitely wanted. Not to mention the conflict over Texas with Mexico. Even more so, the conquest of California was a dream for many Americans, something that was theirs to be taken and that would lead the U.S to expand into the Pacific, and Polk was a big supporter.
slavery was causes when people from europe took people and made them work for themselves
The Portuguese colonized Brazil, and that's why they speak Portuguese.
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In the nineteenth century, in an era known as the Second Great Awakening, philanthropic and charitable efforts grew across the United States. Part of this humanitarian effort focused on educating disabled people. Construction of boarding schools and institutions for deaf and blind students slowly spread across the country and children once considered uneducable now received formal instruction. Nevertheless, the education of deaf and blind people was controversial. Many questioned the influences of public and private funding on the schools as well as the practice of committing children to an institution at a young age, when meant removing them from their families. Varying teaching strategies for deaf and blind children were also debated.
I think that the most important thing you need to realize is that you are not falling behind, you are surviving a pandemic.