The essays presented in this volume are the result of a webinar conducted in 2021. Organized by the Museo del Palacio de Bellas Artes, The seminar was coordinated by Dr. Dafne Cruz Porchini, who brought together an outstanding group of specialists with the aim of examining various projects and themes of this "life cycle", as Jean Charlot called it, who was not only part of the movement as a painter, but is also one of the main chroniclers of the beginnings of this movement. In light of the centennial of Mexican muralism, the unpublished essays in this compendium help to update perspectives on the complex birth of Mexican muralism.