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I can give you my interpretation of the text, providing you with some examples. Personal reflections are a second question.
In reading Animal Farm, it is clear at the beginning that the animals are preparing for a revolution.
This brings to mind the French Revolution (though having done research I know this is not what Orwell had in mind specifically). There is unrest among the animals, the humans (like the aristocracy) have become lazy. living off of the "sweat" and hard work of the animals, and the animals want a better life. They sing songs to lift their spirits, make plans, and develop strategic battle tactics, all very similar to the French Revolution or any revolution.
When the animals revolt, they drive off the humans and take control of the farm, which is like a country. They make up their own rules, but these rules do not apply to everyone, and very soon there are questions as to the selective nature of who is now in charge, and the special privileges they allow themselves, which causes dissension in the ranks. This is also very similar to revolutions.
We saw this with the Puritans who left England because of religious persecution. They wanted to be free to practice as they saw fit with harassment and reprisals. However, as soon as they become firmly established in what was to become the colonies of North America, Puritan leadership became as intolerant as the aristocracy had been in England, and some members of the faith feeling that they had traded one kind of tyranny for another.
Finally, Old Major is a prize Middle-White boar, and a leader who all the animals respect. He is wise and, in theory, his ideas are appealing. However, they are not realistic. However, no one has enough objectivity to see that things may not turn out as they might wish. He gives the animals a dream to pursue, and when he dies, they move forward without him. In that he is not there, those who are left decide to "adjust" his vision as they see fit, losing sight of the purity of his dream. Old Major seems to be a visionary that wants to lead his "people" out from under the oppressive rule of the government (mankind) that controls them.
This is very similar with all the visionaries of history: the difference is that some were realistic and successful because they could turn their dreams into reality: galvanize the populace with realistic expectations. Thomas Jefferson and John Adams come to mind, as well as Martin Luther King, Jr.
Some visionaries are ill-prepared to lead their people into a new world. This can be seen with tyrants, radicals, cult leaders, and other despots.
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