How are the internal and external conflicts in Macbeth and Animal Farm similar and different?

One common theme in Animal Farm and
Macbeth is that men/pigs will desire power above all else. Macbeth
becomes so obsessed with power that he consigns himself to kill anyone who poses as a
threat to his reign. Napoleon similarly changes the rules on the barn to keep the other
animals oppressed enough to allow him to continue.

Just
using Napoleon and Macbeth as examples of
conflict:

Externally, Macbeth is influenced by the
suggestive ambitions of his wife and reacts with reckless violence to the visions of the
witches. Internally, he is conflicted throughout the play: his own ambition for power
and his fear of losing it and the increasing guilt, most notable in his hallucination of
Banquo, which becomes a kind of internal and external
influence.

Napoleon, on the other hand, does not seem
conflicted at all. Initially, he, like the other animals, is oppressed by Farmer Jones
to the point where they take up the revolution. Once he gains all power and ousts
Snowball (comparable to Macbeth’s killing of Banqo), he does not seem to be internally
or externally conflicted. Napoleon does everything to maintain his power and this
includes making enemies or friends; as he does with Frederick and
Pilkington.