How does Napoleon from the book "Animal Farm" contribute to the society?no
Napoleon's primary contribution to the society in Orwell's work is to provide the organizing structure of power within which everyone falls. Napoleon's consolidation of control and use of power is something that is intrinsic to his character and critical in the work. His primary purpose is to organize society and individuals within it so that he and the other pigs will be able to continue in the role of power, and in the function of control. In the scheme of the social order, Napoleon "contributes" by ensuring through both influence and action that his hierarchy of power is not threatened and that all other individuals work towards that goal. It is this contribution that becomes the driving force behind his consciousness as well as others' in Orwell's work.
I do not think that Napoleon contributes much to the animals' society and does not contribute anything at all after the revolution.
Napoleon clearly does contribute to the success of the revolution. If it had not been for him and some of the other pigs, Old Major's dream would never have been translated into actual action. Since the animals were clearly oppressed by Jones, the revolution is an actual help to them.
But after that, Napoleon stops contributing and starts taking. He takes more power for himself and more physical privileges for the pigs and his other close allies. By the end of the book, he is no different from Jones -- even standing on two feet and acting like a human.