Give some stream of consciousness and then the answer. War and Peace (pre-reform Russian: ; post-reform Russian: , translit. Voyna i mir ( vjna i mjir) ) is a novel by the Russian author Leo Tolstoy, which is regarded as a central work of world literature and one of Tolstoy's finest literary achievements.

Based on this passage, who wrote the classic novel war and peace?
The relevant sentence in the passage is: War and Peace (pre-reform Russian: ; post-reform Russian: , translit. Voyna i mir ( vjna i mjir) ) is a novel by the Russian author Leo Tolstoy, which is regarded as a central work of world literature and one of Tolstoy's finest literary achievements.
Therefore, the answer is Leo Tolstoy.