As a young man, Leon Trotsky became a disciple of Karl Marx and a friend of the future Bolshevik leader, Vladimir Lenin (Old Major).  As a powerful writer and political thinker, Trotsky wrote many journals and communist newspaper articles that were opposed to the rules of Czar Nicholas II (Mr. Jones). Consequently, Trotsky spent most of his time in prison. During the 1917 revolution, Trotsky was Lenin's right-hand man. He initially served as the People's Commissar for Foreign Affairs, then, he served as the founder of the commander of the red army (Soviet army) and the People's commissar of War, greatly influencing the Bolshevik victory. However, after Lenin's death in 1924, Trotsky lost between a power struggle against Joseph Stalin (Napoleon) and was eventually assassinated in 1940 by a probable agent of Stalin. 
In the novel, as the parallel character of Leon Trotsky, Snowball is characterized as intelligent, eloquent, caring, and far more visionary than Napoleon. As mentioned at the previous pages (Joseph Stalin-Napoleon & Home), Orwell is often trying to let his readers be aware of things that to him is obvious which in this case is the dark side of the human characteristics. By representing the leaders Leon Trotsky and Joseph Stalin as pigs, Orwell is indicating that they are similar to pigs, greedy and lazy. However, Although Snowball would be a considerably "good" leader for the farm, Orwell decided to represent Snowball as a pig alike Napoleon or Squealer nevertheless. This might be because Orwell wanted to show the readers that although Snowball is a better leader than Napoleon, he is still far from perfect and the characteristics hidden inside are still the same as we can see that even the visionary and caring Snowball is starting to turn more into a human as he agrees with the other pigs that the apples and milk should be contributed to the pigs despite the labour the others are required to do. Through this, Orwell successfully shows the readers that although there might be good and bad people, there are still some human characteristics hidden inside that is the same. Moreover, according to the purpose of Orwell's writings (in order to make us aware of things that were to him obvious), he successfully demonstrated how the leaders during his time were like in his eyes, and how there are both good and bad leaders, yet there will never be a perfect leader, only a better one.