The dominant non-commercial social organ for most people in their local community is their church. Atheists are by definition cut off from this.
There are exceptions of course, Unitarian churches etc, but I would posit that most atheists don't find a comparable social grouping.
Once you joined a church (it didn't really matter which one), you gained a lot of social connections that turned into business connections. I don't know if there was any statistical truth to that, but it was definitely accepted in my family's social circle as a rule.
Care to put forth any evidence that this might possibly be the case?
Personally I think the actual cultural movement towards 'atheism' is simple Leftism. Most people may still believe in the belief of God and thus differ from atheists on the ontological question, but their beliefs about the world in general are vastly different from those of their (for some religions, even still living) ancestors of the same declared denomination and those beliefs are in conflict with classic doctrine.
http://www.pewresearch.org/fact-tank/2015/11/03/5-key-findin...
Hopefully this is changing, but I think it's less that is atheism growing and more that people are becoming comfortable admitting what they really think.
Surely (not athiest) => theist => (believes in a god) => (has a religion)
I'm nonreligious, I don't care to discuss it or think about religion as a part of my life, but it's okay if others want to be religious themselves.
Why don't I want to be labeled atheist? It's looked down upon and many hardcore atheists are exclusionary.
You know how when someone insists on it being GNU/Linux, but most people don't care? That's why I'm nonreligious (but technically atheist).
Now I call myself a "Reformed Fundamentalist Atheist" because it captures that I don't care anymore (reformed), and it sounds enough like a real religion that people seem to accept it as one.
In the spirit of many of the good things on the internet, the Reformed Fundamentalist Atheist church (RFA) is of course an open source religion, under the MIT license :)
A lot of people I think don't care to form a belief one way or another. I'm not sure what that's called.
This statement as such is still just about correlation, not causation (compare ice cream sales and drowning deaths).
But it has been studied.
* CONCLUSIONS: Religious affiliation is associated with less suicidal behavior in depressed inpatients. After other factors were controlled, it was found that greater moral objections to suicide and lower aggression level in religiously affiliated subjects may function as protective factors against suicide attempts. Further study about the influence of religious affiliation on aggressive behavior and how moral objections can reduce the probability of acting on suicidal thoughts may offer new therapeutic strategies in suicide prevention.*
http://ajp.psychiatryonline.org/doi/abs/10.1176/appi.ajp.161...
A religious person in pain without hope looks at suicide as an option and thinks, "I've got it bad now, but it's only going to get worse if I do this..."
Whereas a non-religious person is thinking, "I've got it bad now, but if I do this I won't have to feel anything ever again"
For the discussion I also didn't really make a distinction between a true atheist and someone who believes in a higher power but doesn't go to Church. I should probably have used "secularism".
Care to explain that? Atheism may be growing--in fact, Wikipedia gives an upper bound of the US atheist population at ten percent[0]--but I've never seen anything resembling what I would call an actual cultural movement towards atheism.
[0]: https://en.wikipedia.org/wiki/Demographics_of_atheism#United...