Which would have the least influence on changing the historical study of the civil rights movement?

The least influential factor in changing the historical study of the Civil Rights Movement would likely be the personal opinions of contemporary individuals who were not directly involved in the movement. While these perspectives can provide insight, they lack the empirical evidence and firsthand experiences that shape a more accurate understanding of the movement's events and significance. Historical studies rely more on primary sources, such as documents and testimonies from those who participated, rather than modern interpretations lacking direct connections.