I definitely concur re: Spinoza whose work is still controversial and fundamental to what is regarded as "modern" thought. HN readers are likely to appreciate

I definitely concur re: Spinoza whose work is still controversial and fundamental to what is regarded as "modern" thought. HN readers are likely to appreciate the logic of his work in its geometric proof form, though a number of translations are freely available on the web. Spinoza's Ethics was highly influential on philosophers and scientists of the subsequent centuries, Einstein among them as he openly acknowledged.