what was the idea behind manifest destiny
Americans believed that they had a right to any land they wanted. First used in 1845, the term Manifest Destiny conveyed the idea that the rightful destiny of the US included imperialistic expansion. This idea certainly contributed to several wars.For example, in 1846 the United States declared war on Mexico and proceeded to win much of what is now the Southwestern United States.he idea of Manifest Destiny Doctrine became the torch, that lit the way for American expansion. Although the movement was named in 1845, the philosophy behind Manifest Destiny always existed throughout American History.