"Historic contribution" isn't being debated. What was being debated was your assertion that christianity led to technologically advanced societies. Led to positivism. Of course none of these things would matter to a True Believer, and in fact it would be logical to reject them and involvement in 'worldly affairs' to instead lead by an example, groups such as the amish take this route which is much more respectable in my mind.
Inspirational stories are a dime a dozen. You know how many ghettos were saved by islam during the civil rights movement? The passive resistance of Hindus freed their nation from colonialism. Buddhist monks still resist the attempts of the Chinese to colonize and assimilate Tibet.
Belief is a powerful force for both good and ill.
Goober, archaeology proved the existance of Troy. (along with other classical sites related to mythology) Are the Illiad and Odessey true?
Contemporary sources collaberate events such as the Phoenicians being driven out of their land by effectively Egyptian migrant workers. (the pyramids were not built by slaves) This little kingdom narrowly resisted Hettite conquest and wound up selling its own citizens to settle debts with the Babylonians. (Babylonian exile when the oral histories and traditions were written) These types of events are mentioned by several civilizations in historic documents.
The trick is seperating historic fact from myth. While there was a Troy there wasn't a single, epic, Trojan war. While there was an Israel with a faith based off of Akhenaten's Ra-as-single-god, there weren't burning bushes and magical flesh melting Nazi killing superweapons. (unless pesky time travelers... or Neanderthals were responsible. Anyway the only magical flesh melting superweapon I know of was made in 1944ce, not 1944bce)
Of course you're also ignoring the fact that archaeology also heavilly deals with unrecorded history. (late pleistoceine generally) The Middle East these days is a hotbed for finding out about early agriculture and hunter-gathering homo sapiens. Those temples Saddam was etching his name on? Civilizations with written records predating the 6,000 bce creation mark. Funny how more and more people start pushing that back further as opposed to claiming all of Sumeria was made by satan to trick us.
Not that it matters. Bah! Now I see what Harrappa is more appealing. All of the discoveries about early civilizations without the thumpers breathing down your neck to ensure your discoveries fit with scripture.
The Aborigines were right in not starting agriculture. Coersive power structures, god-kings, gods, god, and all of the other evils of the world.
Maybe we'll dig up the old note outlining the move to agriculture with the 10,000 year "Seldon Plan?"

"This Seldon crisis is the creation of revealed religion. Don't Panic."

...and on a more serious note:
You can not prove or disprove a religion. If you can it is no longer a religion.
So please, stop with the urban legend of your faith being empirically proven when it has not and can not be.
That also goes for Scientologists and Flying Spaghetti Monstericists.