City of God and City of Man

In its opening chapters, Spinoza makes clear that he conceives A Political Treatise to be a continuation of the Ethics, thereby expanding a system the scope of which is already probably unmatched in Modern Philosophy--spanning Ethics, Theology, Metaphysics, Physics, Epistemology, Psychology, and, now, Political Philosophy.  The expansion also complicates any thesis that the culmination of the earlier work is the concept of detachment from worldly affairs.  Now, the mediating link between the two works is the equation of Power and Natural Right.  But, in Spinoza's system, God and Nature are one and the same.  So, not only does he restore the systematic connection between Ethics and Political Philosophy, he reconciles the bifurcation of City of God and City of Man, a radical Dualism commonly accepted upon the rise of Medieval ideologies.