Of all heroes, Spinoza was Einstein's greatest. No one expressed more strongly than he a belief in the harmony, the beauty, and, most of all, the ult… - Benedictus de Spinoza

...[H]e was one of the most illustrious advocates of religious toleration; when his landlords, members of a peaceful and tolerant Mennonite community, asked him whether he thought their religion was good, he said yes, it was good and they should stick to it. For although in his writings he urged us to strive towards a mystical sort of union with God, towards intellectual love and philosophical reconciliation with whatever fate should bring, he knew that his advice was meant for only a very select few, and that the rest, the common folk who are incapable of subordinating their lives to reason, would still need advice about how to lead a good life – the kind of advice that religion provides. This was fine as long as the religion was one that preached peace and unity, and did not breed fanaticism, hatred or despotic government. In the whole history of philosophy there is no figure as lonely as Spinoza.

As the French philosopher Louis Althusser wrote in his 1976 Essays in Self-Criticism, much late 20th century Spinozism has proceeded by ‘attributing to the author of the Tractatus Theologico-Politicus and the Ethics a number of theses which he would surely never have acknowledged, though they did not actually contradict him. But to be a heretical Spinozist is almost orthodox Spinozism, if Spinozism can be said to be one of the greatest lessons in heresy that the world has seen!’. Though Spinozists have existed ever since the radical circles that rippled through Europe in the wake of Spinoza's death, I think it is fair to say that only in the past 50 years or so has there been a Spinozism to match in hermeneutic rigour and creative interventions the history of Kantianism or Hegelianism, that only now has the hereticism that Althusser referred to been complemented by the labour of the concept. Arguably, it is only now then that the scope of his thought and its relevance to our social and political existence can be truly appreciated, at a historical juncture when the communicative power of the multitude and of what Marx called the general intellect is so intensified that the physics, ethics, ontology and politics of Spinoza (what are ultimately indissociable facets of his philosophizing) can be thought simultaneously. Today more than ever, one might argue, is Spinoza, as Pierre Macherey puts it, ‘an irreplaceable reactor and developer’.

While it is patently not the case that key figures such as d'Holbach and Condorcet delved deeply into Spinoza's thought, or cited him often or in some cases ever, at the same time, one must acknowledge that the key elements constituting High Enlightenment French ‘Spinozisme’ in the sense intended here were not discovered or concocted by these post-1740 writers and thinkers but were transmitted to them by those sections of the pre-1730 radical philosophical underground literature, especially clandestine manuscripts and suppressed printed books, that were more directly immersed in Spinoza's own texts and thought. Those who performed this bridging role transmitting the basic elements of ‘Spinozism’ to the generation of Diderot and d'Holbach consisted of two distinct coteries. On the one hand there were those English ‘deists’, Toland, Tindal and Collins especially, who rejected Locke's dualism and principle of ‘supra rationem’ and adopted instead seemingly directly from, or else in emulation of, Spinoza, the latter’s one-substance doctrine based on the idea that motion is inherent in matter, his necessitarianism, anti-Scripturalism and attack on ‘priestcraft’ along with his plea for full freedom of conscience and expression, or ‘freedom to philosophize’. Secondly, there were a group of subversive Huguenot and other French thinkers in the years around 1700, and down to the 1730s, whether or not they themselves can accurately be called ‘Spinozists’, who were deeply preoccupied with Spinoza's texts and bequeathed a powerful philosophical impetus to the generation of Diderot and d'Holbach. Especially important for the transmission of Spinozist ideas in France, and the literary depicting of an underground sect of ‘Spinozists’ pervading the whole of European culture, were Bayle, Boulainvilliers, and d'Argens but there were many others in this group, Tyssot de Patot among them.