manifest destiny was used as a justification for us expansion into
Manifest destiny Many Americans agreed with Paine, and came to believe that the United States' virtue was a result of its special experiment in freedom and democracy. Thomas Jefferson, in a letter to James Monroe, wrote, "it is impossible not to look forward to distant times when our rapid multiplication will expand itself beyond those limits, and cover the whole northern, if not the southern continent."[27] To Americans in the decades that followed their proclaimed freedom for mankind, embodied in the Declaration of Independence, could only be described as the inauguration of "a new time scale" because the world would look back and define history as events that took place before, and after, the Declaration of Independence.[28] It followed that Americans owed to the world an obligation to expand and preserve these beliefs.
Self-determination The revolt of New World British colonists in North America, during the mid-1770s, has been seen as the first assertion of the right of national and democratic self-determination, because of the explicit invocation of natural law, the natural rights of man, as well as the consent of, and sovereignty by, the people governed; these ideas were inspired particularly by John Locke's enlightened writings of the previous century. Thomas Jefferson further promoted the notion that the will of the people was supreme, especially through authorship of the United States Declaration of Independence which inspired Europeans throughout the 19th century.[9] The French Revolution was motivated similarly and legitimatized the ideas of self-determination on that Old World continent.[12][13]