Wow! I loved this book. I learned about the "Father of Environmentalism"! He was way ahead of his time - late 1700s, early 1800s!
I like to follow journeys in books. Wikipedia was helpful for this.
I knew that there was a county and city in California named Humboldt, and they were named after him!
Quotes:
Nature, Humboldt realized, was a web of life and a global force. He was, a colleague later said, the first to understand that everything was interwoven as with ‘a thousand threads’. This new idea of nature was to change the way people understood the world. (p. 87)

James Mustich