This work investigates the fundamental principles of theatre anthropology by examining the physical and mental techniques that define the performer's presence. Eugenio Barba, a renowned theatre director and theorist, draws upon his extensive research and practical experience to bridge the gap between traditional performance practices and modern stagecraft. By analyzing the work of historical masters, he constructs a framework for understanding the 'pre-expressive' level of performance that precedes any specific cultural style or genre.

Experts and theatre practitioners frequently cite this text as a foundational resource for understanding the mechanics of performance. Readers often note the dense, philosophical nature of the prose, which rewards those seeking a deeper academic understanding of stage presence.