César Vallejo (1892–1938) is widely regarded as one of the most innovative and influential poetic voices of the 20th century. Born in the Peruvian Andes, his life was marked by extreme hardship, political activism, and a deep, visceral compassion for human suffering—themes that became the "mortar" of his revolutionary poetry. Despite only publishing two books during his lifetime, his work radically altered the Spanish language, creating a new discourse to express the raw "outrage and anguish" of the human condition. Human Potential: The Life and Work of César Vallejo