These pigs are able to assert leadership because they are "the cleverest of the animals." It is this charisma that allows the pigs to become the leaders of the farm. These three end up becoming the "vanguard" of the animal "proletariat" because they each represent some aspect of political leadership that will form the basis of the animal form of government. Snowball understands the theoretical conditions of the animals leading the farm, while Squealer understands the needs to convince the animals of the authenticity of the pigs' leadership. Napoleon fully understands how to ensure that the revolution is lasting and how to consolidate his own power to make sure that the change from humans to animals is a lasting one. Each one of these pigs is able to grasp the immediacy of the moment and seize the moment to ensure that their leadership is presented as the only logical alternative to that of the humans.