1. Gives hope for getting through life
No, if anything it gives you reason to shorten life. Unless you are religious and believe you're going to hell...but then you have psychological issues severe enought that I question your mental competence to decide one way or the other about religion.
However, perhaps 'gives life meaning' would be a good reason. Yes, I know that atheists can argue that life can have meaning without an afterlife, but the arguments are unconvincing when you live in a static enviroment, as most the world was prior to the scientific, industrial, and technological revolutions (and, from a philosophical point of view, they seem meaningless when you take into account that the universe will eventually destroy all trace of any human existance).
2. Gives hope for a better life after this one
I think more important than hope of a 'better life' is simply hope for continued life...better or not, at least there's something there.
3. Provides help/aid to others
Probably not, humans arn't that altruistic, we only give aid because we expect to get something back (perhaps subconsciously, but it's still in our calculation)...now if you were to say 'provides help/aid to ME' then perhaps.
4. Provides the basis/origin for morality
But it doesn't those things are part of our ontology or evolution, depending on your perspective...religion just plays on what's already there...it adds nothing, and if anything detracts.
5. Provides a framework of morality, so that we know when something is wrong
6. Provides a social network, or sense of community, helps meet likeminded people
This is probably it for the overwhelming majority of people, and closely related to #7 and #12.
7. Provides a positive context in which to do things (e.g., study, play basketball, etc.)
This is essentially the same as #6
8. Because it reveals truth
Nah, it only plays on revealed truth.
9. Because it leads to salvation/sanctification/transformation
Well, as a universalist I would clearly take issue with the suggestion that religion is necessary for this
But concerning salvation, yeah, I'm sure several are in it for this reason...usually scared or guilted into it for this reason. Of course, this too is linked to the cultural/social aspect, as the guilt or fear usually comes through cultural means.
Though personally I can think of no greater sin than to worship God out of fear of hell, save to worship him out of greed for heaven. Not even the great deceiver Lucifer has tried this deception of the Divine and even Judas revealed his deception prior to his death, rather than trying to storm the gates of heaven by the same.
As for transformation/sanctification or, in other, more secular, words, self-improvement, this should really be listed separately...yes, it is a reason for some, but probably not on the same scale as salvation.
10. Because God created us, and deserves our worship
If you believe God created you, this is a pretty logical conclusion to come to.
11. Because it is interesting
Nah, that's just why we all spend so much time on OC.net...as you should know, one can find religion interesting without being religious.
12. Used to maintain cultural identity
This is essentially the same as #6
Am I forgetting/missing any others? Which of these (or others) do you personally find to be persuasive?
Yeah, though I didn't expect it to be there...there are the ontological arguments (mostly neoplatonic arguments, or derivatives thereof) and then arguments about evolution (from evolutionary psychology). Essentially both could be used to argue that humans are natually religious, the former would give metaphysical reasons and the latter pragmatic ones (giving life extra meaning could have a survival advantage).
Do you think that any of them are irrefutable, and that the only way to deny it is to be willfully ignorant?
Yes, some are irrefutable. That doesn't mean they're provable either, of course, it just means that logically then cannot be refuted. You run into the same problems as trying to prove the non-existance of God, good luck...and as a my mathematical education pounded into my head time and time again, ANY claim must be proven, regardless of whether it is in the affirmative or negative.
Perhaps the question you meant to ask is whether there are any unique reasons to be religious, that is to say reasons for which reasonable non-religious alternatives could not be found? If so, then from an empirical perspective I could only point to the discussions about religion in evolutionary psychology; of course, this is not saying that religion is absolutely necessary, only that it was a benificial element of our evolution and that we evolved as religious beings for this reason (of course, not all evolutionary psychologists would agree.
If, however, we are discussing this from the perspective of neoplatonic philosophy, I could give many reasons why religion is absolutely natural and necessary.
What about others who can claim to live up to most or all of these to some extent or another, such as Islam, or even an atheistic version of buddhism? Anyway, any thoughts?
There is truth, as well as falsehood, to varying degrees, in all religions.