Firstly, if you are talking about Gnostic Atheism –id est “there is no god or gods”- when you talk about all atheism you are mistaken, just as one would be mistaken to lump all theists into one group just because they share a belief in a god or gods. Secondly, and to address your point, atheism has no purpose as it has no tenets and no dogma. All one can infer from the statement “I am an atheist” is that the speaker does not believe in a god or gods. There is no church of atheism, there is no central authority.
In the betterment and advancement of humanity for both future generations and ourselves.
The comfort will be that I would have, hopefully, led a full, long life and helped contribute to the world in one way or another. Also, sure, I might not think that I am going to live forever in a magical kingdom, but then again I am also not afraid that I will go to an endless torture session because I “sinned.”
A person described as agnostic is, most likely, an atheist as gnostic and agnostic convey the knowledge that the individual has on the subject and not the actual belief held by them. I can be both agnostic and an atheist –that is to say, I do not believe in a god or gods but cannot say that I know that there is or is not a god or gods- just as another person might be an agnostic theist. Even so, it does not matter what Darwin himself professed to believe for, as I have already said, there is no central atheistic organization.
We are going to have to agree to disagree on this point, as it in my opinion that life is just as wonderful without a god as it is with one.