Answer:
William created a fusion of English and Norman systems of power to create a new kingdom that lasted well into the Middle Ages. England's ties with Scandinavia were severed and her ties with France were tightened, an alliance that has lasted to present day.
This depends on who you consider to be the author. If the author in your case would be a famous old historian, then they would probably marvel at the architectural accomplishments of ancient Rome and how they were able to create such magnificent structures in such a short amount of time.
Made elected officials more directly accountable to their constituents
Secondary Sources are useful because they offer a different point of view to past events. While most secondary sources are based on a primary source, they are still useful because of the analysis that they can offer compared to past stories.