Before we start discussing your five books, can you tell me why this particular time in history, from 200 BC to AD 400, interests you?
This is the period when we see the shift from a pre-Christian pagan world to a Christian world out of which the roots of our Christianity arose ”“ first out of the Jewish religion, and then as a force increasingly in its own right. The consequent changes in world view are still essential to our outlook on the world. Whatever personal faith (or lack of it) you may have, only by studying this period can you get behind Christian values or the values of our other major religions, and look at them from a historical point of view and realise that they were historically formed, that they are not the only values and are not obligatory.
The philosophical/theological conclusion seems:
1. Not to follow from the premises.
2. Not, itself, to be a matter of history.