Although Bolívar never prepared a systematic treatise, his essays, proclamations, and letters constitute some of the most eloquent writing not of the independence period alone, but of any period in Latin American history. His analysis of the region's fundamental problems, ideas on political organization and proposals for Latin American integration are relevant and widely read today, even among Latin Americans of all countries and of all political persuasions. The "Cartagena Letter," the "Jamaica Letter," and the "Angostura Address," are widely cited and reprinted.