Who is the antagonist in Open Veins of Latin America: Five Centuries of the Pillage of a Continent by Eduardo Galeano?

Open Veins of Latin America: Five Centuries of the Pillage of a Continent is a nonfiction book. Galeano does not include an indentifiable antagonist. He does, however, address what he believes to be the negative traits of the historical figures he highlights in the book.