The advanced Mayan civilization is considered a stone age culture but it developed mathematics to a higher level than Renaissance Europe possessed and developed the most accurate calendar ever found. Archaeologist have found a battery that dates back to stone age Babylon. Modern Engineers marvel at the pyramids and are awed by the technical accomplishments of stone age Egypt. So your comment concerning Bronze Age tribesman demonstrates an arrogance that denies the accomplishments of ancient cultures. In fact bronze age Greeks were the first western scientists if you discount stone age astronomers. BTW, did you know that Daniel predicted an increase in knowledge in the 6th century B.C.? This is one of the signs for the end times in eschatology.
If you want to appeal to Occam's Razor, then the simplest explanation for all of creation is a creator since the diversity of animal life argues against evolution.
Why does your position have to be science vs. religion? Some of our greatest scientists were men of faith and they did not view one contradicted the other.
Now, relativity disagrees with quantum mechanics disagrees with cosmology. So which discipline has the last word? As we learn more about the red shift cosmologists and some physicists are questioning the defined constants required for the formulas used in physics and geological dating. In other words the latest science argues for a young universe and therefore a young earth, both of which defeat evolutionary biology as a valid theory for the diversity of animal life.
When Roemer (the first man to measure light speed) published his findings he was considered a lunatic. It took science almost 100 years to accept that light speed is not infinite, which started a controversy that exists to the present. Scientists are the worst at accepting the latest empirical evidence that their theories might be wrong, therefore it may take 50+ years for more evidence to back up what is now being measured (not defined) to be accepted by mainline physics and astronomy.
I have bookmarked Twain's essay. I am sure it is a good yarn and I will enjoy what another atheists thinks about organized religion.