I'm fourteen and an athiest. This year my entire world studies class has been based off religion. The more we learn, the more and more disbelieving I get. Please don't lecture about how I'm too young too make decisions on religion or anything, please just answer the question and give me reasons I would understand.
It's really quite simple. I don't believe in any gods because there is no reliable evidence for their existence. There is no difference between the Greek myths, Norse myths, or Grimm's fairy tales and any modern-day religion. They are just stories, not fact.