http://ezinearticles.com/?Whats-Wrong-With-SEO?&id=8729174

Before Google came upon the scene, SEO was pretty easy, bordering on trivial. All you really needed to do was keyword-stuff your page(s), and your website got good ranking. The more keyword-stuffing, the better the rank. If you discovered that you were being outranked by your competition, you just added more copies of your keywords. That no longer works (fortunately)