This document provides an overview of the countries of South America, divided into three sections. The first section describes the Northern Tropic countries of Guyana, Venezuela, and Colombia, including details on their populations, economies, and agricultural systems. The second section covers the Andean countries of Ecuador, Peru, Bolivia, and Chile, focusing on how their physical environments have shaped settlement and industries. The third section profiles the Southern Grassland countries of Paraguay, Uruguay, and Argentina, noting their climate, cities, histories of military rule, and transitions to democracy.