•Why it earns a slot
Why it earns a slot: it is the rare systematic philosophy that ends by admitting its own destination is nothingness, and stakes that admission on hundreds of pages of argument rather than a slogan.
Schopenhauer argues the entire visible world is just your idea, driven underneath by one blind, insatiable will, and the only escapes are losing yourself in art or renouncing desire altogether.
This distillation is written from the freely available original, which is always the better read when you have the time: Project Gutenberg.