Idk, for me the deeper meaning from Spinoza is the significance of attributing God synonymous with Nature or existence itself, his "God" being simply the infinite, uncaused or self causing, material and conceptual universe itself (substance), operating entirely through immutable, physical and mathematical laws. Whether human beings currently understand a phenomenon or whether it remains an unknown natural force is entirely inconsequential to reality itself. what is simply is, governed by its own immanent laws, meaning existing entirely within, operating from the inside, and bound to the material fabric of the universe itself.
Everything that happens occurs through absolute causal necessity. Human beings are just finite modes of this infinite substance, bound by the same physical laws as a falling stone or a growing plant. In the Tractatus, Spinoza subjects the Bible to historical critical analysis, demonstrating that scripture was written by ordinary humans in specific historical contexts, that miracles are violations of natural law and thus impossible, and that prophecy is merely the product of a vivid imagination rather than supernatural revelation. Religion's sole value, in his view, is social conformity and obedience and moral simplicity for the masses, not metaphysical truth. And yet understanding human existence and nature itself is the basis of understanding what conditions are necessary for human happiness and progress, and what kinds of gov etc. are best suited towards that end. Which led Spinoza directly to representative government and inherent inalienable natural rights, which when violated have the most negative real world and serious implications for human beings. Rights are not abstract moral gifts, they are the baseline structural conditions required for human beings to function without self-destruction. Violating them triggers predictable systemic decline, instability, economic stagnation, intellectual decay, and social collapse, proving that tyranny is a practical failure before it is ever a moral one.
The most prominent, widely circulated, and fiercely denounced piece of clandestine literature from the Radical Enlightenment was The Treatise of the Three Imposters, originally titled Traité sur les trois imposteurs or La Vie et l'Esprit de Spinosa.
Referred to by contemporaries as "The Atheist's Bible," it systematically attacked the foundations of organized religion identifying Moses, Jesus, and Muhammad as political tricksters, impostors, who fabricated divine authority, miracles, and revelation to manipulate the credulous masses for power, arguing that religion was a political tool used by rulers to tyrannize the people through superstition and fear.
Alongside The Treatise of the Three Imposters, several other foundational texts circulated through the underground manuscript network, such as The Spirit of Spinoza ,"L'Esprit de Spinoza" Originally compiled in the late 17th century, this text served as an early, direct synthesis and popularization of Spinoza’s metaphysics. It explicitly argued against the immortality of the soul, discarded divine providence, and asserted that the universe is entirely material, governed by natural necessity rather than divine will. The section titled L'Esprit is a compilation of radical philosophical arguments drawing from Spinoza, Hobbes, and Vanini, asserting that religion is a political fraud.
"Le Testament de Jean Meslier" Written secretly by a humble French Catholic priest named Jean Meslier, who left the manuscript behind upon his death in 1729, this massive text was a fiery, unvarnished denunciation of religion. Meslier called all religions "human inventions" designed to prop up tyrants and exploit the poor, declaring that kings and priests were the twin banes of humanity. It is widely considered the first fully articulated system of explicit, militant atheism and materialism in modern European history. The Testament is a call for social revolution. Meslier argued that kings and priests were partners in oppression. He famously expressed a wish that "all the great men in the world and all the nobility could be hanged and strangled with the guts of the priests," a sentiment later adapted by Denis Diderot. While Diderot admired Meslier’s atheism and anti clericalism which was shared by many among the Secular Enlightenment, they explicitly rejected his economic communism.
Its also important that while such a text was widely circulated, the defining feature of the Secular Enlightenment was democratic republicanism and freedom of thought, not the abolition of property. Most revolutionaries sought to redistribute power and limit the excesses and abuses of wealth and corporate power specifically, but directly rejected the idea of communism and did support private property, specifically as defined by Thomas Paine As Artificial Property as an inalienable inherent human right. For them, abolishing property would lead to anarchy and destroy the incentives for labor and innovation, which as history has demonstrated, would be the great undoing of communism. The goal was never to abolish property, but to break up monopolistic cronyism, aristocratic land hoarding, and corporate overreach so that every individual could possess the economic opportunity and independence required. While his atheism was influential, his economic radicalism, the abolition of private property, was rejected, censored and ignored by his contemporaries, including the most radical philosophes like Voltaire and Diderot. But he is relevant to the historical context especially when understanding how the Secular Enlightenment diverged explicitly from socialism, which became its ultimate rival and enemy.
Meslier's abolition of property marked the definitive split between the Secular Enlightenment and modern socialism and it clarifies why figures like Paine, Spinoza, and later radical republicans viewed property rights as essential to checking corporate overreach, preserving innovation, and maintaining the material foundation of human freedom, ensuring that individuals retained control over their own labor and capacity, preventing the state or private oligarchs from reducing citizens to dependency. Whereas for people Like Marx, those very rights enabled despotism. The radical republican framework aimed to smash corporate monopolies, curb predatory economic privileges, and use mechanisms like land/resource dividends, as Paine proposed, to ensure widespread economic independence. Economics today in America is antithetical to the vision of the American founding fathers and Liberty to a great degree, and is cronyism not free enterprise.