Moerat fights for freedom of the Cheznyans, oppressed by the Russians. The era we talk about is 1850, though it could have easily been written a century and a half later. This is one of the reasons I love reading Tolstoj. His books are never dated. War and peace, his 1800-page masterpiece talks about Napoleon invading Russia. It could have been about any war. Tolstoj, one of the great Russian authors, has a strong sense of justice. He criticises the church, even though he is a Christian himself, he doesn't like the aristocracy, though isn't exactly working class himself, and he dislikes (in this book) the Russians, his country.
As an avid fan I have read quite a few books by Tolstoj. This is not my favourite. Not big enough, not deep enough, not compared to some of his classics. But that still means an extremely high level, that most authors will never reach.