How is power divided under the concept of federalism?

Ineed with what i should write for my research paper. my topic is history of slavery. 1800 words. all i need is what to write in each paragraphs. like when the research paper has titles for each paragraph and it explains the tile in each paragraph. for example when did slaverh begin? why did it begin like an outline.

Which roman emperor was responsible for a major shift in the dominate religious attitude of the roman empire?

How do private property rights serve as an incentive in a free enterprise economy ?