|Abstract||More than one hundred years after his death, Jose Guadalupe Posada's work continues to gain popularity and inspire artists today. Posada's prints of skulls and skeletons left their mark on Mexican popular culture. However, Posada's depictions of sensational stories, social criticism, and daily life facilitated the production of thousands of chapbook covers, corridos, board games, and broadsides. These images reveal the lives, relationships, and activities of the masses during the Porfiriato, and provide an account of a time in Mexico filled with change. An examination of Posada's works enhances our understanding of the popular classes' realities under an oppressive regime. Therefore, this thesis focuses on Posada's popular culture images to demonstrate that the popular classes participated in Porfirian efforts at modernization.