What has Martin Black written and why does it matter?

Martin Black's primary written contribution is Sustainable Horsemanship, a book that provides the most systematic account of his approach to developing horses through the complete arc of training from foundation through advanced work — and that represents one of the most valuable written documents in the contemporary Dorrance-influenced natural horsemanship tradition. The book matters because it provides a level of specificity and systematic organization that the foundational texts of the tradition — Tom Dorrance's True Unity, Bill Dorrance's True Horsemanship Through Feel — deliberately avoided in favor of philosophical depth over practical instruction. Black's book does not replace these foundational texts but complements them by providing the practical working horseman's account of how the tradition's principles apply at each stage of a horse's development, from the earliest groundwork through the progression toward the finished bridle horse that the vaquero tradition represents. The title reflects Black's core concern: horsemanship that is sustainable both for the horse — that develops the horse's physical and mental health rather than depleting it — and for the horse-human relationship across the full arc of a working horse's career. His writing also addresses stockmanship and the integration of cattle work with horsemanship development, making his book particularly valuable for practitioners working in the ranch horse and working cattle context that has been underrepresented in the natural horsemanship literature relative to the arena and clinic context that more urbanized practitioners primarily address. For students of the Dorrance tradition seeking practical guidance on how the tradition's principles apply in the full context of working ranch horsemanship, Black's written contributions are among the most valuable resources available.