But there are claims that come out of Spinoza’s deductive system that are even more important for our times, more piercingly relevant, than his happening to have produced a stunningly contemporary answer, through pure deductive reason, to the mind-body problem and given us a view of the emotions that science has caught up with, in thinkers like Damasio, after some three hundred years. What Spinoza has to say about the importance of allowing the discovery of nature to proceed unimpeded by religious dogma could not speak more pertinently to some of the raging controversies of our day, including the recurring public debate in America over Darwin’s theory of evolution. The sides are drawn up now much as they were in Spinoza’s own day.
Just as relevant to current concerns, particularly in America, is his fundamental insistence on the separation of church and state. John Locke, who spent some years in Amsterdam, right after Spinoza’s death, associating with thinkers who had known and been influenced by Spinoza, transmitted this insistence to the founding fathers of America. The spirit of Spinoza lives on in the opening words of the First Amendment to the U.S. Constitution, the phrase referred to as the Establishment clause: “Congress shall make no law respecting an establishment of religion.”
Spinoza placed all his faith in the powers of reason, his own and ours.