The Human Footprint is a global, thematic, and multi-disciplinary history of the planet, from its earliest origins to its current condition. Avoiding conventional narratives and using the latest research in a diverse range of fields, Penna brings harmony to human history and ecology and provides a fresh, much-needed narrative of world history.
From our pages (Sept–Oct/09): "Penna weaves together Earth’s natural and human history, drawing on recent research in geology, climatology, evolutionary biology, anthropology, and other disciplines. From this analysis he forms a single narrative that expands upon human evolution, industrialization, and population growth."