Why did Dunbar use "Negro Dialect" in his poetry?

That meant, like other black poets, Dunbar was challenged to write what was acceptable to whites while also trying to maintain some kind of truth and dignity for and about the black race. For Dunbar, the use of dialect was a prerequisite for becoming published and recognized as a poet.

Explanation:

john smith was the first englishman to sail around the world. francis bacon served as attorney general and lord chancellor of england. he took up aristotelian ideas, arguing for an empirical, inductive approach, known as the scientific method, which is the foundation of modern scientific inquiry.