One question, though, is:
Why do some people who examine the evidence conclude that God/god/gods don’t exist and other people who examine the same evidence conclude that God/god/gods exist? (To keep it short, I’ll use “God” to refer to the ultimate supernatural entity.)
It seems to me that the different conclusions are related to a person’s “beliefs”.
Sometimes atheists say that not believing in God is the same as not believing in various imaginary creatures. But, the comparison is missing a key point about the belief in God, namely, that God created everything, or is the Prime Mover, or the Source of All Life. (I’m talking about the *belief *in God and not about the validity of that belief.) Whether a unicorn exists or not, there’s little relevance to a person’s thoughts and behavior. But, a belief in God can have a profound impact on a person’s life.
Some theists “believe in God” because … that’s what they believe. IOW, they haven’t examined their beliefs and just accept what they’ve heard their entire lives. If some of those theists stop believing in God, there’s little else that they need to explain. Perhaps they are more interested in distancing themselves from religious ideas and customs than they are in the deeper ontological and epistemological issues.
But some theists have examined their beliefs and they feel that their beliefs are justified by the evidence and by logic. (Again, whether there arguments are valid is not the point here.) If some of those theists stop believing in God, they need compelling arguments to dismiss beliefs that appeared to be rational, and they need alternative explanations for the existence of the universe, of consciousness, and of humanity – explanations that don’t require the existence of God. Of course, those explanations exist, but not everyone who hears those explanations accepts them as valid reasons for not believing in God. Why not? And why do some people accept those explanations as being adequate, and that, therefore, the existence of God is not necessary?
I think that it’s naive to say that atheism is simply a “non-belief”. Yes, it is a “non-belief”, but, for anyone who examines the universe and humanity’s place in the universe, it is more than that. By not believing in the existence of God, atheists have formulated interpretations and explanations of the world that are satisfactory to them, but deeply unsatisfactory to theists.
Yes, the word “belief” has various meanings and yes, some theists conflate those meanings to argue against atheists. But it seems to me that atheists have many beliefs, and some of those beliefs are related to their lack of belief in the existence of God. It seems to me that, ultimately, the belief is: God is not necessary. God is not necessary because I have another *better * way of explaining the world and my role in the world. Better how? Who decides, and how? Conscientious self-examining atheists have answered those questions to their own satisfaction. I believe I have.