Answer:
He claimed the Frontier Thesis or Turner Thesis and it is is the argument advanced by historian Frederick Jackson Turner in 1893 that American democracy was formed by the American frontier.
Brief explanation of Declaration of Independence of the principles of a) popular sovereignty, the people are the ultimate source of the authority of their government b) social contract it is the legitimacy of the state over the individual c) natural rights, not dependent on the laws, customs, or beliefs of any particular culture or government and therefore universal or inalienable (rights that cannot be repeated or restrained by human laws) d) individual rights, the equality and this is the rule of equality that tied up to the creation of mankind to God.
The major policy "grouping" of President John Kennedy in the US was "<span>C. the New Frontier," since this had a lot to do with making America more competitive against the USSR. </span>
