George Orwalls Animal Farm?

i read the story and i get it but im sooo lost on these questions.... the 1st one is "how does this beast fable show the flaws of a political system based only on the concepts of materialism and secular humanism which regards man as nothing more than an evolved ape?" and the 2nd one is "At the end of this allegoric beast fable characterizing various political archetypes, Napolean does not adress his followers as "comrades" but as "gentlemen" and said to them, "here is my toast:to the prosperity of Manor farm", the pigs were playing poker with Mr.Pilkington and the creatures outside felt it was impossible to tell which was which. What does george orwall at his stories end imply about revolutions that climax with the leader and his personality cult followers becoming the top priority of the new and so insperationaly advocated political system to change and improve all past systems? after such a climax of the leaders unchallenged rise to total control of power, what is fated to the falling action of such an archetypical patern as mankind has witnessed all too often?