Wow OP has 0 knowledge of history! The reason for the drop after Roman times was because of the barbarians who took down Rome not Christianity. Please before you post something at least have the knowledge to know what time came when.
I do agree with the console graph tho.
The so called barbarians were actually ahead in everything and thats why they took down the, by then, christian Rome. Rome were stuck in religious dogma and the "barbarians" from the east had embraced all the knowledge from earlier civilizations like Greece. Any other history is just rewritten leftovers from that religous dogma.
I'm an atheist and therefore neutral.
LOL. When the barbarians took down Rome they did it in numbers not tech. Rome was the most advanced civilization there was in the day. When they took down Rome they destroyed all the documents for doing such things as architecture, technology, and government, just to name three.
which lead to the dark ages back to the passed situation.