Stemming from the "shouldn't we all be agnostic" thread...
My argument is that we aren't born atheist, because for us to be atheist, we have to know the God concept. When we are born, we cannot profess any beliefs; rather, we are a blank slate. After we've been exposed to things, such as religion and politics, we decide for ourselves what we believe in. Thus, we can only say we are born ignorant of the God concept.
Let's look at the most commonly argued definitions of 'atheist':
1. Atheism is a disbelief in God.
In order to have a disbelief, there has to be a belief. A baby cannot say "I don't believe in God" (obviously they literally can't say so), because they don't even KNOW what God is. I cannot say "I don't believe in the Invisible Pink Unicorn" if I don't even know what the heck it is; if I've never even heard of the thing! To believe otherwise is just plain illogical. It's like speaking Spanish without even hearing a word of it!
2. Atheism is the belief that God doesn't exist.
This one is obvious. You can't have a belief when you're just born.
3. Atheism is the absence of a belief in God.
This one is tricky. The 'absence of a belief in God' could mean "Ignorant of God" or "don't have a belief in God (which is essentially a disbelief in God)". Many atheists love to use this definition because they claim that atheism isn't a belief. Let's look at the word 'atheist', from the Greek 'atheos', meaning 'without God, or Godless'. Atheos comes from theos, meaning "God". The 'a' in 'atheos' is simply to negate 'theos'. The truth of this statement cannot be denied. Clearly, then, there needs to be a 'theos' for there to be an 'atheos'. This seems to beg the question that God exists; however, by this, I mean that there has to be a God concept for it to be negated. Similarly, theism (the belief in God) is negated by the 'a' in 'atheism'. The truth of this cannot be denied, either. Thus, there has to be theism for atheism to exist. There has to be a 'belief in God' for there to be a negation (a disbelief in God); it's simple logic. Thus, a baby needs to know what theism is in order to negate it; since a baby does not know what theism is, the baby cannot negate theism, and thus cannot put the 'a' in atheism, and thus cannot be atheist.
Questions? Comments? Insults? G'head, post a reply! 8)