Deeply researched biography, following this influential European naturalist doing mostly things you'd expect: heroically adventuring through the Americas, taking the rest of his life to write and influence other scientists and artists and politicians (Goethe, Simon Bolivar, Charles Darwin, and John Muir all get space here), and mostly not worrying about money or relationships. And yet this is well told, and the central thesis rings through that Humboldt's realizations and advocacy about the interconnected global phenomenon of life and distribution of species and ecosystems and colonial practices impact on diversity have all dispersed so thoroughly into our world by those who were his fans that we've nearly forgotten Humboldt. A fine hope for us all.