??? -- How is "I believe God is a fiction/fictitious being" (or something akin to that) not a belief?
Atheism is most certainly a belief system; it just happens to be, well, an atheistic, rather than theistic, belief system. It's on par with the other two main cosmological belief systems:
- Atheism --> Unequivocal belief that supernatural beings (gods) are fictional. I'm not exactly sure how atheists resolve (do atheists even broach a positive answer it?) the cosmological question, but that's another matter...Nonetheless, they are confident that the answer isn't a deity.
- Agnosticism --> Unrelentingly equivocal belief that they don't know what's believable and what's not as go answers to the cosmological question.
- Theism --> Unequivocal belief that a deity is the answer to the cosmological question.
Adherents to each system of belief regarding answers to the cosmological question structure and live their lives in accordance with their system of belief. For example:
- Atheists --> Burial rites are about mourning the loss of a loved one and/or consoling other bereaved individuals.
- Agnostics --> Burial rites may be partly about something having to do with theistic catechism and it may also be simply about mourning their own loss and consoling others.
- Theists --> Burial rites are as much about the afterlife, the soul and other elements of a theology's catechism as they are about mourning the loss of a loved one and consoling others.
Other "pivotal" moments in one's life -- birth, marriage, personal achievements, personal strifes, etc. -- are marked in accordance with one's system of belief.
I think it quite safe to say atheism is exactly what the term indicates: a non-theistic belief system. Sure, it's a system that exogenously, with regard to the existence of an external frame of reference, that frame being theism, professes nonbelief; however, that in a comparative context it seems not a belief system does not make it endogenously a system of belief with its own set of tenets. When one considers atheism in terms of the positive, rather than negative, assertion it makes, it's a lot easier to see that it is indeed a belief.
Aside:
One of the observations I've taken from my tenure on DP is that many folks are given to relativist ways of viewing the world, ideas, policies, people, etc. That relativist "stuff" is, IMO, what allows folks to forbear all sorts of stuff that, when one considers the "stuff" in its own right and not vis-a-vis other similar/related "stuff," it become far clearer whether that "stuff" has merit, value, "probity," etc. After all,
the character virtue of princely manhood does not develop and firmly insinuate itself when one practices to see and choose the lesser of two evils.