I am sure we all have more than one reason, but what is the main one for you?
I didn't think it made sense that an omnipotent being would create creatures in their image and then create millions of species of animals, parasites, bacteria and toxins that could kill them in so many ways.
It makes no sense. Also most if not all religions have blood on their hands, both currently and historically. The christians, muslims and Jews have all killed each other for thousands of years.
I just like to avoid cultures that engage in murder or war in general.
Religion requires a few basic errors in logic. The first is that consciousness exists outside the brain. The second is that a god explains something (and there are more).
We know very well that the brain requires no supernatural explanation to explain consciousness.
It should be obvious that god as an explanation for us, requires an explanation for god. The explanation for god would be a gods-god, or a god for god.
I can go into both further if you like.
The main reason I don't believe in magic is because I have enough education to understand where that kind of thinking comes from, but that education also brings the knowledge that believing in magic is not a sufficient definition of religion. Religion is just whatever discipline people use to maintain their sanity in an insane world. A thorough rejection of magical thinking alone does not necessarily provide protection from depression or fear or anxiety. Healthy, science-based practices exist which can do that, and from a historical perspective, they should rightly be categorized as religion. If my tool isn't doing what I need it to do, I get a better tool. I don't say tools are useless. We don't need the two thousand year old dirty bathwater but we very much do still need that baby.
Well, to start with, I AM religious: I'm an atheist Pagan. But I don't believe in gods or the supernatural. Religion isn't just about what you believe--it's about your values, and what you DO.
I do not follow any of the mainstream religions because their values suck and they are demonstrably wrong about the nature of the Universe. Their gods are imaginary.
when I was small my parents never made me go to sunday school whereas every other child in our small town went to one of the local ten churches. Because the streets would be deserted with no one to play with (1953 we played in the street -very few cars or the local bomb-site). So I went to sunday school with different friends a different church each time - methodist, congregationalist, baptist high anglican etc. Because I was an avid reader of any book I could get my hands on I had got through most of the minor classic childrens books and I found the teachings somehow incomplete - not really enough information in the story and a bit dry - I sometimes liked the people who told the stories their faces all aglow and I wondered if mine would ever glow like that - I could see that they were getting something out of it that I wasn't. And still it was better than kicking my heels alone on an empty street.So somehow I never got the connectedness that others had. Also I had a bi polar mother and a depressed, war hero, father neither of whom could cope with me - So my retreat was into books till I left home at 15 y.o. Nothing in the bible spoke to me at all and it all seemed pretty lame compared to the reality of my life and the books I read from the library.
Religion is apart of my family for all the wrong reasons. I grew up Baptist and anytime I had a question about significant subjects I would be told not to question god. I was always told you're looking too deep into this. Just believe. That's when I knew I no longer had a rational belief in a god nor the rest of my family for that matter.
I studied myself out of god belief. There is no proof in any of the holy writings of a god being. Now some people tell me there could be gods anyway even if you do not have tales of them in books. OK. You would be beleiving in them in advance wouldn't you.