The real terror network Book

Ed Herman is a Wharton professor and collaborator of Noam Chomsky, and wrote this book was in the early 80's in response to another book written at the time called "The Terror Network." This book reviews the state-sponsored terrorism that has plagued Latin America throughout the mid-20th century, and what roles the US and media have played in perpetuating them.

I was almost entirely unfamiliar with the recent histories of Latin America (beyond some understanding of the rise of Pinochet in Chile), and wish I had more context, but what I read was astonishing and awful. This region has been plagued by state sponsored torture, death squads, abductions, and all sorts of suppression. These crimes were carried out by the governments of 8 Latin American countries (Brazil, Chile, Cuba, Dominican Republic, Ecuador, El Salvador, Guatemala and Uruguay), with degrees of support from the US varying from financial support of the suppressor to direct invasion.

The "why" here tends to follow a similar theory across all cases: an alignment of interest between large corporate interests that want cheap labor and market protection, US executive administrations that want to stamp down socialism and promote US companies overseas, Latin American leaders who want a docile populace, and US media that is subservient to corporate sponsors.

The book goes into great detail on the "what" listing unbelievable crimes perpetrated across all of these countries, with extensive documentation in the footnotes.

But the "who" seems limited to the groups in Latin America, and is short on details regarding the other actors. Namely, who are these corporate interests that are forcing so much of this violence? The violence is happening, and the documentation seems pretty clear that the US has been heavily involved, but I don't really understand what specific parties were pushing for this.