Final answer:
James Baldwin warned White America about the persistence of racism and discrimination in the late 1950s and early 1960s through his works and activism.
Step-by-step explanation:
In the late 1950s and early 1960s, James Baldwin issued a warning to White America about the deep-rooted racism and bigotry that still existed in society. He spoke out against racism, homophobia, sexism, classism, and poverty, and became a moral witness to prejudice and inhumanity in all its forms. Baldwin's works, such as his critically acclaimed novel 'Go Tell It on the Mountain' and the essay collection 'Notes of a Native Son,' explored the African-American experience and confronted white America with the harsh reality of systemic discrimination.