Dr. Pelayo Fernández García, a scholar from the University of Oviedo and expert on the Third Marquess of Santa Cruz de Marcenado, delves into the life and ideas of this influential figure. Marcenado's military leadership during the Spanish War of Succession highlights his strategic blend of psychological and historical insights. His extensive treatise explores ethics in warfare and innovative governance in counterinsurgency. García reveals how Marcenado's views, initially celebrated, echo modern concerns about rebellions and insurgencies, showcasing his timeless relevance.