Your claim that a single logical fallacy is to blame for the world's woes is wrong - probably because you're a cretinous fool who likes Slashdot polls. Just think about it - if you claim that one fallacy is less bad than another then you'll be ranking them all, increasing the spacing between them, and soon you'll be discounting major logical flaws entirely. You're dooming our children and their children after them to a world where logical fallacies are accepted and even encouraged! Won't somebody think of the children? Einstein was against the ranking of logical fallacies, stating that any flaw in logic was as damaging as any other. CowboyNeal takes a similar view. Hundreds of thousands of Slashdotters can't be wrong on this, can they? Of course not. Oh, and everyone I know who suffers from cancer also has been seen suffering from logical fallacies. Seems to me that faulty logic causes cancer, and you don't want to get cancer, do you?
Your only option is clear; vote for all of the above.