•Why it earns a slot
Why it earns a slot: published anonymously in 1670, it was banned by the Dutch Reformed Church and placed on the Catholic Index within years, built entirely on the claim that Scripture teaches obedience and charity, not physics or metaphysics.
Spinoza takes apart the idea that Scripture proves anything beyond obedience and charity, and argues a free state needs free thought to survive.
This distillation is written from the freely available original, which is always the better read when you have the time: Project Gutenberg.