How does W.E.B Du Bois develop his economic idea of Reconstruction?

How does W.E.B Du Bois develop his economic idea of Reconstruction?

Source 1) 500 words: (not too long): Reconstruction and Its Benefits.
How this was influenced by ideas of democracy in America. How this source was not influenced by economic viewpoints. Why did it not have much impact on the field. How it is viewed

Source 2) 500-600 words: The Reconstruction of Freedom.
How and why his analysis changed. What was the main ideas what was it based on. What were his ideas of economy / capitalism in relation to reconstruction.

Source 3) 1000 words (longest section) Black Reconstruction in America. What was the main economic views presented here. Why he had this view and how he came to be influenced by Marxism. Briefly, the larger scholarly impact it had. What people thought og it

Conclusion: The importance of this change and how significant this economic view of reconstruction was.