What are Orwell's major concerns in Animal Farm?

Although many
people think is a direct attack on Communist Soviet Union, he actually
uses the Soviet's as an example to show the danger of totalitarian governments and that
corruption is inevitble when one becomes too powerful.  He also wants to warm readers about the
dangers of revolutions and how they more often amount to pointless violence as the new
government becomes even more corrupt than the original government once it gets its taste of
power.  The pigs in the story prove all of this, as they originally set out with the goal of
improving the farm; however, they soon lose their way and take advantage of the lesser animals
when it benefits them to do so.  By the end of the book, the pigs (the new government) are no
different than Mr. Jones (the old government).  Consequently, life on Animal Farm for all the
animals except the pigs and the dogs are no better, arguably worse, than they were before the
Animal Revolution.