So, lots of arguments get repeated across forums, even across the entire internet. One of those involves atheism, and what 'bad' things atheism has been involved in; usually as part of a discussion of how much evil is the responsibility of religion. These arguments often turn to Naziism or Soviet Communism or Mao's Communism etc., and things usually degenerate pretty quickly into an unproductive conversation.
It makes sense that it's hard to uncontroversially classify an ideology as being atheist, as atheism is (well, that's a big argument too, but hopefully this short answer will be sufficient for our purposes) not about believing IN something, but about NOT believing in something. It makes sense that not believing in something wouldn't be fertile ground for an ideology, when you know, that's what ideologies are--believing in something.
So a comment in another thread got me thinking about this: there is an ideology that I think is beyond dispute as an atheist ideology, and that's Ayn Rand's Objectivism. I don't think there's any serious question about the connection between the other major beliefs of Objectivism and the rejection of belief in god. The individualism that is at the core of Objectivism cannot coexist alongside belief in any god where that title isn't just a fancy name for a space alien.
Over in another thread there was a post about militant atheism. Didn't want to take this too far over there because it's a "Fellow X Only..." thread. However, it got me thinking: before Dawkins, before Hitchens, there was Ayn Rand: