The United States was first referred to as “The Great American Melting Pot” In the 1908 play, The Melting Pot, by Israel Zangwill.
Quickly adopted into popular culture, the term referred to how for over a century, people had come to America’s shores from around the world, leaving their nation and culture behind and becoming part of a new culture; the American culture.
This process of “melting” into a homogeneous society is something that has been rather unique in the USA.
Regardless of where people came from, what religion they professed, what culture they were born into or what skin color they had, upon arriving in the United States, they left that behind and became American.
For over two centuries, people have come to the USA to become Americans, with many having that as their lifelong dream.