It's not about spine. It's about realizing that evolution in this regard is a process that, while it can be hastened along, would likely cause more trouble were it just flat out done all in a sitting. If 80% of people are religious, what do you suppose banning it would do? Let's lay out a hypothetical scenario. It won't just "go away." A bit like a vaccine-resistant bug, it would morph.
Trying to update my sig ...