The corollary function of an essay is that of persuasion. As that of “pure science” – expressed in some scientific articles – asserts its objectivity and disinterest in convincing by other means that aren’t facts. Thus, the essay is used to impulse certain ideas or to convince of certain positions regarding certain facts. In order to accomplish this function, the essay exposes data and concepts in an evident thesis. José L. Vega (1979) states in his essay “Stages and Processes of the Sociopolitical Evolution of Costa Rica” the following, “ Questions arise, till when do we wait for the historical initiative to be in favor of the development of sectors which have not benefited from the achievements of the agro-commercial model, nor by the new scheme of the industrial/financial/ technological integration we are so depended on?”. As you can see, this text is emotionally charged, by using a rhetorical question and accumulation of information, etc, these suggest a certain stance.