Atheism is a non-prophet organization

Yes atheism is non-prophet organization,in fact it is not an organization but only a belief

Kittys don't have a religion..we prefer to be free and live wild!

I saw this phrase before as a joke on one of those t-shirts sold somewhere over the internet and now I'm amazed it was a religion topic here on myLot. I really don't understand if there is really such a thing coz from what I understand about atheist they don't believe on religions so what about this topic? How could it gear to going into capitalizing when in fact they were not really an organization? Is there an international organization for the atheist?