Identify three groups that white says heard the call of the american idea. in the book american idea

The American Idea is a book worte by Thedore H. White. It focuses on the idea that the United States was created under the ideals of "life, liberty, and the pursuit of happiness".

According to White, the 3 groups that heard the call of this idea were:

he impacted the society ith his knowwdge and advance our research by years to come