George Orwell wrote Animal Farm in an allegorical format to draw attention, not to the ideals of communism - he was a socialist and very sympathetic to many of the goals of communism - but to the perversion of the ideal by the leaders as time went on.
Orwell knew that with power came the abuse of power.
This is indicated best in
All animals are equal, but some are more equal than others.
In order to enjoy Animal Farm it is not necessary to have historical knowledge of 20th century communism and Karl Marx. However,as a school text book and to understand and read it insighfully, it is obviously required.
Boxer is representative of what was known as the "proletariat," the unskilled, ordinary worker of Russian society -the working class, even the peasants. This sector of society has the most to gain from a system where everything is distributed evenly and fairly. Unfortunately, this is also the sector that is most open to exploitation. Boxer has blind faith in Napolean and a belief that hard work is good enough
I will work harder
Napoleon is always right
show his committment. The class he represents is also mostly uneducated and the 'animals' have no way of knowing whether they are being taken advantage of or not .The working class is an essential part of any society and it is important to note that when Boxer falls, farm productivity is adversely affected.
Refer to the eNotes study guide and navigate to the themes and characters and the other material available to understand the sinister and scheming characters that represent communism and the Russian revolutionaries.