Palpatine sucessfully exploited Anakin's desire for an ordered, heirarchical goverment, where everybody knew who was on top and obeyed without question.
Obi-Wan, Yoda and Mace Windu were just dumb to see that Anakin had more and more issues with authorities he saw as chaotic and erratic and began to relate more and more with an authority figure he saw as forceful and ordered.
Of course, Palpatine also exploited Anakin's childish insecurities and his recklessness, and the Jedi were foolish on more ways than can be counted, but that's another story alltogether.
Oh, and Hannibal is definitely a chaotic evil genius. He had an utter disregard for any sense of community, continuity or order