One of the most popular allegories in English literature is George Orwell’s Animal Farm.
Animal Farm is a short read, but it essentially symbolizes the 25 years that followed the Russian communist revolution of 1917. At the same time, this allegory demonstrates how some revolutions that are supposed to lead to utopia (a perfect world) can instead lead to abuses of power that create a dystopia for the people.
Have a look at these interactive presentations that you can use to support your teaching.
Short Summary of Animal Farm