@Fulhamish
"Can I ask the true atheists here whether they believe in anything at and, if so, why?"
I consider myself a "true atheist" in that I believe there is no god. I identify myself as a Secular Humanist in that I believe strongly in the ability of people to change the world for the better. I believe that by employing peace, logic, education, understanding, and philanthropy, humanity can be its own best hope for improvement in its condition. Why do I believe this? History is full of examples of humanity's innovation, ingenuity, intelligence, and hard work. Yes, it's true that humanity has often employed these things to make life *worse* for one another, but on the balance, we've accomplished some great things. Quite simply put, I believe in humanity's power to change the world because it's the only thing that ever has.