John Steinbeck is a towering figure in twentieth-century American literature; yet he remains one of our least understood writers. This major reevaluation of Steinbeck by Gavin Jones uncovers a timely thinker who confronted the fate of humanity as a species facing climate change, environmental crisis, and a growing divide between the powerful and the marginalized. Driven by insatiable curiosity, Steinbeck's work crossed a variety of borders between the United States and the Global South, between human and nonhuman lifeforms, between science and the arts, and between literature and film to explore the transformations in consciousness necessary for our survival on a precarious planet. Always seeking new forms to express his ecological and social vision of human interconnectedness and vulnerability, Steinbeck is a writer of urgent concern for the twenty-first century, even as he was haunted by the legacies of racism and injustice in the American West.