Since your request is a bit open-ended, I will provide a useful write-up about the essay El ensayo mexicano moderno by José Luis Martínez. This guide is designed to be helpful whether you are looking for a summary, an analysis for a class, or context before reading the text.
This is perhaps the most cited section of Martínez's work. He explores the generation that sought to answer, "What is Mexico?" Ensayo Mexicano Moderno Jose Luis Martinez Pdf
Volume I: Focuses on the origins and development of the modern essay, starting with Justo Sierra and covering 27 other key figures, including Samuel Ramos and Daniel Cosío Villegas. Since your request is a bit open-ended, I
Entre los factores que han influido en la configuración del ensayo mexicano moderno se encuentran: The Philosophers of the "Mexican" (Identity) This is
Availability and Access
The "Father" of the Modern Essay: The collection begins with Justo Sierra, whom Martínez identifies as the undisputed father of the modern Mexican essay.