What is the name given to the belief that the united states had the right and duty to expand across the north american continent?

the declaration states, “we hold these truths to be self-evident, that all men are created equal, that they are endowed by their creator with certain unalienable rights, that among these are life, liberty, and the pursuit of happiness….”

answer; the automatic system because it is a "gut reactor"  

answer; unimodal and symmetrical;

answer; the digital divide;