After 1785 public opinion of Spinoza changed from almost universal contempt to almost universal admiration, largely as a result of the publication of… - Benedictus de Spinoza

Over the centuries, there have been periodic calls for the herem against Spinoza to be lifted. Even David Ben-Gurion, when he was prime minister of Israel, issued a public plea for ‘amending the injustice’ done to Spinoza by the Amsterdam Portuguese community. It was not until early 2012, however, that the Amsterdam congregation, at the insistence of one of its members, formally took up the question of whether it was time to rehabilitate Spinoza and welcome him back into the congregation that had expelled him with such prejudice. There was, though, one thing that they needed to know: should we still regard Spinoza as a heretic? Unfortunately, the herem document fails to mention specifically what Spinoza's offences were – at the time he had not yet written anything – and so there is a mystery surrounding this seminal event in the future philosopher's life. And yet, for anyone who is familiar with Spinoza's mature philosophical ideas, which he began putting in writing a few years after the excommunication, there really is no such mystery. By the standards of early modern rabbinic Judaism – and especially among the Sephardic Jews of Amsterdam, many of whom were descendants of converso refugees from the Iberian Inquisitions and who were still struggling to build a proper Jewish community on the banks of the Amstel River – Spinoza was a heretic, and a dangerous one at that.

...To the extent that we are committed to the ideal of a secular society free of ecclesiastic influence and governed by toleration, liberty, and a conception of civic virtue; and insofar as we think of true religious piety as consisting in treating other human beings with dignity and respect, and regard the Bible simply as a profound work of human literature with a universal moral message, we are the heirs of Spinoza's scandalous treatise [Tractatus Theologico-Politicus].

The Declaration of Independence, that extraordinary document first drafted by Thomas Jefferson, softly echoes Spinoza. John Locke, Spinoza's contemporary — both were born in 1632 — is a more obvious influence on Jefferson than Spinoza was. But Locke had himself been influenced by Spinoza's ideas on tolerance, freedom and democracy. In fact, Locke spent five formative years in Amsterdam, in exile because of the political troubles of his patron, the Earl of Shaftesbury. Though Spinoza was already dead, Locke met in Amsterdam men who almost certainly spoke of Spinoza. Locke's library not only included all of Spinoza's important works, but also works in which Spinoza had been discussed and condemned. It's worth noting that Locke emerged from his years in Amsterdam a far more egalitarian thinker, having decisively moved in the direction of Spinoza. He now accepted, as he had not before, the fundamental egalitarian claim that the legitimacy of the state's power derives from the consent of the governed, a phrase that would prominently find its way into the Declaration. Locke's claims on behalf of reason did not go as far as Spinoza's. He was firm in defending Christianity's revelation as the one true religion against Spinoza's universalism. In some of the fundamental ways in which Spinoza and Locke differed, Jefferson's view was more allied with Spinoza. (Spinoza's collected works were also in Jefferson's library, so Spinoza's impact may not just have been by way of Locke.)