Description of Manifest destiny

The attitude of "manifest destiny" is what kept the country moving in the westward direction, overrunning many cultures along the way. The politicians told the people that it was the American's right to take over the entire continent. Americans fought the Native Americans and the Spanish to take the land they lived on. I doubt that the Native Americans would agree with your thought that it was a great idea for the Americans to move onto their territory and they got moved onto reservations in the less desirable areas. The Spanish lost California in the process. Explain.