in what ways is the concept of no taxation without representation central to america's identity as a nation?

No taxation without representation is at the heart of American identity since it was a call for independence and the need for Americans to manage their own affairs. It is also at the root of American democracy since it entails the election of the nation's representatives to Congress

No taxation without representation was the main slogan after the passing of the "Stamp Act" by the British and this becomes the main identity of America and turned it is towards Revolution.

Explanation:

Americans were not happy with the British oppressive policies like high taxation on cotton, tea, and sugar, etc.

People were protesting for this only instead of ratifying these oppressive policies they introduced the "Stamp Act".

In which all the legal documents should get stamp first and need to pay duty for it this mainly affected the Lawyers and journalist and educated masses, protest erupt.

protesters start demanding for the representation in the British parliament, with the slogan "No taxation without representation".