<p>First of All, Buddhism isn't a religion. Proper name of what you call Buddhism is Buddha Dharma. Dharma is untranslatable Sanskrit term that roughly means righteousness underlying the law[You can check [url=<a href="http://abhishiv.googlepages.com/dharma.php.htm%5Dthis%5B/url">http://abhishiv.googlepages.com/dharma.php.htm]this[/url</a>] if interested]. Buddhism and Hinduism aren't religions, because you don't have to do something in order to be a Hindu or Buddhism. aspiring said earlier that Richard practices some form of Buddhism. You can't become a Buddhist by practicing some rituals. In Ancient India, where these two Dharma developed, all people of the known world practiced the same Dharma. That's why there's no concept of conversion in these two(contrast that with Judaism where you need to be circumscribed in order to be Jew, or Baptized in Christianity). For you can be a Christian and a Buddhist at the same time. In Nepal many people claim to be both Buddhist and Hindu. That's why these two aren't religions in Abrahmic or Western sense. Not to mention that there's nothing that you could do that would make you a non-Buddhist.</p>
<p>Atheism exists. But then the thing is that true/sensible atheists object being called atheists. You don't have a special name for those not believing in aliens(if there's, then it's not used frequently), then why for those not believing in god? Contrast that with our teen, liberal, atheists that claim that they are atheists 300 times a minute.</p>