In Animal Farm, is the transition in control from Snowball to Napoleon the turning point from sound leadership to corruption?
Snowball's expulsion is the major turning point, as this gives Napoleon freedom to institute his decisions without debate. However, the corruption of power in the farm was seen much earlier, when the pigs decided that they should receive a better portion of food than the other animals. Setting the milk and windfall apples aside for the pigs is the first overt clue that the balance of power and privilege is not as equal as Old Major had wanted:
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