During the 1800 there was a big economic boom in the northern states. However, the south also had cotton as a leading cash crop during the 1800s.
The origins and cause of the Mexican-American War are very complex, but in general it was started only because the US under President Polk wanted more land.
Monastic communities were centrally important to the revival of learning during Charlemagne's reign.
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There are many aspects to Romanticism, although from the list above perhaps the best options are "emotion" "mystery" and "melancholy"