What is the relationship between unity America and the success of the nation’s

Despite our many differences, Americans have always come together every Independence Day to celebrate our national birthday. Which is truly fitting. From the nation’s beginnings, our leaders have warned that strength can be found only in unity.

George Washington said that “the bosom of America” was open to all, but only if they were willing to be “assimilated to our customs, measures, and laws: in a word, soon become our people.” Alexander Hamilton said the nation’s future would depend on its citizens’ love of country, lack of foreign bias, “the energy of a common national sentiment, [and] a uniformity of principles and habits.”

Explanation:

Indeed, the one sure way to bring down America, according to Theodore Roosevelt, “would be to permit it to become a tangle of squabbling nationalities,” each insisting on its own identity. And Woodrow Wilson said flatly, “You cannot become thorough Americans if you think of yourselves in groups. America does not consist of groups. A man who thinks of himself as belonging to a particular national group has not yet become an American.”

may i know the title of the book?