That we are knocking on the door of argumentum ad populum here aside, perhaps we should have a thread on the success of non religion.
May I offer 4 rEasons in no particular order.
1: Theism but not expressed in membership or attendance.
2: what Peter Hitchens referred to as The rage against God
3: Neotenisation of European and NorthAmerican populations
4: apatheism
In any case trumpeted claims of the End of Religion have not come to pass.
One of the reasons sometimes given for the survival and growth of Christianity is that it somehow, because of its success, points towards the existence of the Christian God. So, to show how nonsensical an argument that would be, I referred to the extraordinary growth of the LDS church, and the even more extra ordinary growth of irreligion in the last 100 or so years. They don't exactly fit well with such a presumption do they?
As far as the growth of irreligion is concerned, whilst it may well be explained by any number of things, it is not evidence for the existence/non existence of any god at all. That was the point that I was making, Vlad. The survival and popularity of a belief/non belief is not evidence of the existence/non existence of any god.
As far as your own reasons are concerned:
1)I don't really understand this. The success of non religion isn't dependent on theists not being members or not attending their various churches unless you are suggesting that might be a sign that they are losing their faith perhaps.
2)Undoubtedly this is true in some cases, more often perhaps though against how humans often express their attitudes towards this God.
3)I think you'll find that neotenization is strongly regarded as a characteristic of human evolution. Stephen Jay Gould, for instance, says we have been "retaining to adulthood the originally juvenile features of our ancestors". Nothing particularly new about that then, and the same characteristics are basically the same in all human races.
4)Here I think you have a strong point. I suggest that increasingly(especially in Europe, for instance) people find the idea of God rather surplus to requirements, when they think about him at all. Indeed, I think I would probably count myself amongst that number, as the idea of God has no emotional impact on me at all. I am interested however in how others are affected by their beliefs and how they justify them to themselves and others.