Who was Alexander von Humboldt? Was he really a lone genius? Was he another European apologist for colonialism in the Americas or the father of Latin American independence? Was he a roving Romanticist, or did his sensibilities belong to the Enlightenment? Naturalist, philosopher, historian, and proto-sociologist--to name just some of the fields to which he contributed--, Humboldt is impossible to contain in a single identity or definition. His voluminous writings range across so many different fields of knowledge that his scholarly-scientific personae multiplied even during his...