Theists: What is the most compelling argument you have heard for Atheism?

[Esquilax]

Adult conversions is a good measure of how the population overall subjectively assesses the evidence for Christianity. If you have a different theory that would explain the effect, please provide.

Human history is a constant process of new technologies and viewpoints allowing for an expansion in the scope of our knowledge, during which time old truisms are often questioned, revised or dismissed entirely? We just happen to be at the point in that history where christianity is in the questioning/revision stage, a stage being unnecessarily elongated by theistic insistence on redefining terms to fit old ideas within the new paradigms that are arising via human progress. Go back far enough and you could make your exact same argument about geocentricity, or the four humors.

It's always amusing to me how willing christians are to treat their religion as some special unique phenomenon, when in actuality it fits very well within established trends.