Atheists - how did we get here?

I don't know how we got here and I do not know why you are worried that I don't know. Let me ure you that I do not care that I don't know and furthermore I don't care that you are worried that I don't know. You are entitled to believe as you please without a detailed explanation. So am I. I don't proselytize and I don't drink with those who do. Nuff said?