I have not read anything further than the first several paragraphs, and I may not agree with anything else whatsoever in it, but I do agree strongly with the part I've underlined here in red. Is there an instution in the way of our happiness? Vive la Révolution!
And a key aspect of that is in the part I did not underline, which is that Lucretius should not be interpreted as preaching the "insignificance" of humans, as some seem to interpret Epicurus/Lucretrius as implying. Certainly any individual only occupies a tiny space in the vastness of an infinite universe, but that by no means implies that the individual should see himself or herself as "insignificant" in general.