Is the Christian conception of Natural Law indispensable to a coherent moral theory of the State?

In your paper, be sure to mention the Natural Law thinkers examined in the course and include the many Natural Law concepts contained in their theories: justice, statesmanship, covenant, Christian kingship, democracy, the interaction between religious and civil offices, and positive law/public policy formation. It is important that the natural law ideas of the following philosophers be discussed: Plato, Aristotle, Cicero, Augustine, Aquinas, Luther, Hooker, Calvin, Hobbes, Locke, Rousseau, and Rawls. Please see the attached research paper instruction. Here is the link to Rawl’s book, which is the study material for this week: (https://www-oxfordscholarship-com.ezproxy.liberty.edu/view/10.1093/acprof:oso/9780195136364.001.0001/acprof-9780195136364). Please avoid plagiarism. My initial assignment was rejected for this reason

Below is the additional instruction from my professor:
n your paper, be sure to mention the Natural Law thinkers examined in the course and include the many Natural Law concepts contained in their theories: justice, statesmanship, covenant, Christian kingship, democracy, the interaction between religious and civil offices, and positive law/public policy formation. You should consider all of these topics to best answer the question.

Be sure to read closely the grading rubric for the assignment. Scriptural excerpts with citations are required in all written assignments. Note that at least 20 scholarly sources (peer-reviewed academic journal articles or books published by university presses), which should include the course readings.

This is your opportunity to expound upon topics that you did not get to discuss in detail in the Book Reviews or Discussion Board posts.
The paper must be at least 20 pages written in current Turabian format,
Utilize and cite at least 20 appropriate sources, which should include the course readings, in sufficient quantity to justify your position and/or conclusions, and must, in all other respects, be in accord with the standards of academic writing.
Answers to the prompt must be supported with research and citations. It is not unusual, for instance, to have 3–4 citations per paragraph in doctoral-level research.
Remember also that writing a research paper, especially at the doctoral-level, requires you to weave in ideas from numerous sources and then in turn synthesizing those ideas to create fresh insights and knowledge.