Themes of war and peace: humanitarianism and fraternity.
Although "War and Peace" does not describe the life of farmers, besides describing the war and the protagonist Andre, the author also created many other "tragic" characters to express sympathy for them.
All this highlights Tolstoy's humanitarian thought of "the insulted and the injured". Although the story takes place in the aristocratic class, it is obvious that it is not only the aristocrats in the novel who are persecuted, and it is not only the protagonist Andre who is persecuted by the war, but millions of working people.
War and Peace depicts the real and rich people's life during the Great Patriotic War in Russia. The Russian people are not discouraged by the cruel plunder of powerful enemies. They use just wars to stop unjust wars and strive for a peaceful life.
References:
Baidu Encyclopedia-War and Peace