Everyone knows an atheist. You may not know it, but you do. Many atheists are closeted because of the social and familial stigma that comes with being an open atheist in a society full of religious believers. Often referred to as the fastest growing demographic in America, those with no religious affiliation make up about 10-15% of the US population. That means it's likely that 1 out of every 10 people you know either doesn't subscribe to an organized...