Unity? Unification? Agreement? Are there options to answering the question?
This can be an example of nostalgia. (Nostalgia is a sentimental longing or wistful affection for the past, typically for a period or place with happy personal associations according to Oxford Dictionaries)
In "The American Dream", the speaker uses a rhetorical argument to persuade listeners that Americans must join together as equals. The American Dream is a national ethos of the United States, a group of ideals in which freedom includes the opportunity for prosperity and success. The American Dream appeared in the Declaration of Independence, declaring that "all men are created equal" with the right to "life, liberty and the pursuit of happiness".
