Why is Hobbes so concerned with the relationship between the corporeal and the incorporeal? How does this discussion relate to his broader arguments about civil power versus spiritual power?

What is the historical context in which Hobbes wrote Leviathan? How did the violence of the English Civil Wars affect Hobbes, both personally and philosophically?

How did Hobbes influence the work of other philosophers, specifically John Locke and Jean-Jacques Rousseau? On what issues do these three men agree? How do their philosophies differ?