Good article. If you want more, rather than reading Darwin, I suggest Dennett's Darwin's Dangerous Idea, which gives a broader, more modern view of the importance of evolution. Especially of "variation and selection", the core ideas of Darwin, and without a lot of frequently irrelevant, for the general reader, biological details.
Whenever I read about Darwin I'm impressed by his commitment to a pretty disruptive idea in the face of substantial criticism. Also interesting that he (over)worked himself to the detriment of his health and relationships but left behind a pretty amazing legacy.
Not surprised pg is interested in him as a subject!
>Both our life spans and our five senses are inadequate to the task of comprehension: The most powerful mechanism of organic change lies well beyond our everyday experience.