Ever since I was very young I’ve felt an unexplainable drive to seek out , discover, and even defend truth, whatever that may be. I think somehow this desire translated into a fervent religious belief through my teen years and a lengthy role in defending that belief. That drive still exists, though my methods of determining exactly what is and is not true has changed entirely (from the view that truth was dictated by the Bible to the view that truth is dictated by the evidence is a pretty massive transition) and at this point I feel that the defense and propagation of that which is true transcends mere desire, but has moved into the realm of obligation.
For me, it seems that the atheists, skeptics, Humanists, naturalists, rationalists, and scientists of the world may even have a moral obligation to see that truth is not only spread (peaceably) but also defended in a world where the rational or empirical are often scoffed at – or worse. When religious or otherwise irrational society largely dictates both social standards and the political environment there are some pretty severe consequences for virtually everyone that has to share space on this planet with them. From homeopathy, to fundamentalists who refuse medical treatment for their children, to proponents of the Don’t Ask – Don’t Tell policy, and the denial of equal rights to homosexuals the majority largely decides what the rest of us can and cannot do, additionally these people will make victims of anyone and everyone in the name of their god.