In this 1909 volume the nineteenth-century culture is discussed focusing on the post-romantic and unrealistic restorations of spirituality that carry within themselves a kinship with positivism and the key of their failure, both revealed in the persistent intellectualism that imprints all forms of alleged spirituality, rediscovered or founded from scratch by Emerson, Tolstoy, Ruskin, Nietzsche, William James and by the planning attitude of the future of the new socialist Utopias.

Satan, the Waster, published in 1920, is an essay on political anthropology of the Great War in a radically pacifist and rationalist perspective. The book consists of a symbolic comedy focused on the traditional metaphor of the devil and a collection of essays that clarify its infinite meanings and suggestions. The attentive readers will be enriched by this atlas of the conscience of Europe of the Great War with a radically changed vision of the whole phenomenon.