After suffering two economic depressions in the beginning of the 19th century, people started to seek their living on new lands that were absolutely free.American nation thanks to the expansion opened new commerce: new trade roots to countries in the Pacific by building ports on West Coast. Manifest Destiny touched all main human issues: religion, money, race, morality and patriotism as well.
They said that there was nowhere in the Constitution that supported the extension of boundaries. Though they were legal citizens, they were not treated as such.
Also, when America received the Mexican Cession, the Mexicans living on the land automatically became U. The Americans treated them as second class citizens in the same way that Britain had once treated Americans.
They also said that with more land, the United States could extend railroads, supporting trade from east to west.
Expansion would also give access to the Pacific Ocean, which would open up overseas trade.
The broadest scope of Manifest Destiny was applied to a slogan to areas beyond the continent, namely Cuba, Hawaii and South America.
Overall and taking into account all above mentioned, Manifest Destiny was a crucial page in the American history.Supporters said that expansion would be good for America in the same way the Louisiana Purchase had been.They argued that expanding would help rid the United States of foreign influences and at the same time, make America look stronger in the eyes of the world. Americans who were against expansion debated that it was unconstitutional.For Americans, after the successful end of the war, the feeling of Nationalism extended its victorious lands.As to war conclusion, American settlers considered that their superiority had to move across the minor nations, spread their traditions and institutions through the whole continent.Southern expansionists, in hope of convincing Northerners, said that expansion would help end slavery because it would shift the slave population westward.The South argued that expansion would free up a lot of land for agriculture and manufacturing, which would help the stability of the economy.It was America's duty to extend liberty and democratic institutions across the continent.Underlying this divine American mission was a feeling of cultural—even racial—superiority.Many Americans supported the belief of Manifest Destiny.Northerners who were troubled by economic instability and overpopulation believed that Manifest Destiny would make urban areas less crowded.