I'm saying right now poof it ceases to exist gone. Would the country be safer, more productive and more innovative?
My opinion is no.
Thoughts?
Questions like this can't possibly make any sense. The answers to these questions are contingent upon the not-poof-it's-gone-edness of religion declining.
However, religion is declining in America, and America is becoming safer, more productive, and more innovative. But from what I can tell, those improvements and the decline in religion are parts of the same overall trend, and it's hard to show what is causing what. Generally I believe that a decline in religiosity leads to rationality which in turn leads to a decline in religiosity, but that's not a new observation.
Let's look at abortion (and associated women's health) and gay marriage, which are the two issues that are opposed almost exclusively by religious movements for religious reasons. Gay marriage is pretty much doing fine, while abortion/women's health is under strong religious attack. So the effects are not consistent across issues even while religion is declining. Is abortion another incremental line in the sand? Are the religious pushing in all their chips? Will the next religious uprising be weaker? I'll come back to that.
Other areas where we would expect to see an improvement with the decline of religion are education & scientific literacy, but those improvements take a long time to realize.
My pet God's advocate position is about what to do with our Sundays. As an atheist, without any pretense, I could walk into practically any church in America on any Sunday and pour out the contents of my heart to complete strangers, and receive comfort and advice in return, with no strings attached (provided I pick a new church the next week). What is there to replace that? Unconditional fellowship and surrender are handled well, on average, by our church culture. How much value do those things have though? Am I begging the question? Is there a point of diminishing returns with continued church fellowship? Those are questions I ask, and I don't know the answers to them. Obviously you take the good with the bad.
But back to religiosity and the point about abortion, and specifically the 2016 election. Something really interesting happened. Religious people supported a candidate who they knew was not religious, not moral, not a good example for their children, and all of those sorts of things. So why did they support him? The biggest policy reason is because of his vow to get rid of Roe vs Wade. Why did they pick the least Christian person of the bunch? Maybe they believed that an outsider could actually get it overturned. Or maybe that was just enough of a plus when combined with his snake-oil, preacher-like conman shtick, which religious people (especially older religious people) are susceptible to. It's hard to answer but those things are key.
Even though abortion is still under attack, we've won the battle for science in public school and the battle for gay rights. And the attack on abortion isn't as strong as it could be- conservative SC justices are not necessarily in lock-step with the Christian right, though Gorsuch probably will be. The worst outcome we might reasonably expect is that abortion becomes a lot harder (or illegal) in republican states, but if that happens, that will only be temporary I think.
And what other religious wedge issues are there? Stem cell research- which the political Christians are going to lose, either to common sense or technology. Religious conflict- it's conceivable that we end up in a holy war in America over Muslims, but I don't think that's likely. Hate crimes are happening but they're not endemic anywhere. We're also not under any sort of real threat unless nuclear terrorism becomes a thing.
Overall I'd say both that religion is declining, and that we're becoming better people. Those are obviously linked, but it's hard to call one or the other a cause. We see generally good trends across a range of issues but are at risk of a few setbacks.
I've been studying moral panic and tonight I'm researching early modern Germany and the Lutheran response to witchcraft in Rothenburg (Bavaria). They were a more rational people than many of their neighbors and their relative legal isolation makes them a good case study. They took the reformation seriously and embraced the beginnings of mechanical philosophy (God as watchmaker) which was a big improvement over Catholicism and other sects. They valued evidence and they were more interested in exposing people for believing in witches than were in calling people witches. They even preserved their history better than many others. It's quite clear that they benefited from fewer religious beliefs, and they could be a good lesson to Americans.