500
In this Russian literary critic's famous "Letter to Gogol," he wrote, "As far as I can see, you do not rightly understand the Russian public. Its mood results from the condition of Russian society, in which fresh forces are on the rise and trying to break through, but, being brutally repressed and unable to find an outlet, cause only despondency, apathy, and gloom."
Who is "Vissarion Belinsky"?