I’ve got a soft spot for “Dialectical and Historical Materialism” (though I can’t claim I understand it all), but I remember liking the letter where he admonishes a comrade for calling themself a “Stalinist”. I wish I could remember which one that was!
I like his writing style, and the way he lays his points out. There’s still a lot in the archive for me to read!
If you had ever taken any history class beyond a high school level you would know that this is not, nor has it ever been, true, for ANY period of history EVER