During the nineteenth century, an anti-elitist movement attempted to unite poor Whites and Blacks in the rural South against the traditional elite classes. This movement was called .

Populism

Explanation:

During the nineteenth century, an anti-elitist movement attempted to unite poor Whites and Blacks in the rural South against the traditional elite classes. This movement was called populism. Populism is a political stance or movement that aims to improve the powers of poor/ordinary citizens over the elite in the 19th century in deciding the government policies. In the early 19th century, the movement started as a farm-based movement and eventually became the third party in the 1892 election.

answer; the correct answer is (ethics);

classical republicanism, also known as civic humanism, is a form of republicanism  developed in the renaissance inspired by the governmental forms and writings of  classical  antiquity, especially such  classical  writers as aristotle, polybius, and cicero.