From DJP’s article:
“When the German poet and polymath Goethe, the philosopher Friedrich Schelling and the Romanticists revived Spinoza’s philosophy in the 19th century, it inspired scientists working on phenomena such as heat, steam, electricity, complex systems, and the origin of life such as Johann Wilhelm Ritter, who discovered UV radiation and the rechargeable battery, Hans Christian Ørsted who discovered the principle of electromagnetism, Michael Faraday, Alexander von Humboldt, Charles Darwin or Ernst Haeckel. Haeckel who followed Spinoza in conceiving the universe as “a single substance that is God and Nature at the same time” even got himself announced as a monistic “antipope”. On the other hand, the credo of the Romanticists who stressed the priority of the creative subject over objective facts favored a development fostering alternative facts and pseudo-science that brought about an association of monism with esotericism.”
This is probably the key to further discussion: which supposed ‘version’ of the Romantics did Marx follow?
Or is the article written by a dualist, who separates ‘objective facts’ from ‘creative subject’?