So Siris was the brighest human who have ever excisted on this planet. Who were the dumbest then? The Darvin Awards has a great list of candidates.
The Darvin Awards is a site that (quote):"...honor those who improve our gene pool... by removing themselves from it. We commemorate the men and women who gave their "all" in an effort to improve the human species. Of necessity, the honor is generally bestowed posthumously...The Darwin Awards salute the improvement ofthe human genome by honoring those who accidentally kill themselves in really stupid ways."