Marriage and Family Therapy (MFT) is a specialized field of psychotherapy focused on understanding and improving relational dynamics within families and couples. Originating from systems theory, MFT emphasizes that individual behaviors cannot be fully understood in isolation but must be considered within the larger context of family interactions and relational systems (Nichols, 2013). The purpose of this book is to provide a comprehensive, integrative framework for practicing marriage and family therapy. Specifically, the book will focus on a Biopsychosociotechno-spiritual (BPSTS) approach, which encompasses five interconnected domains: biological, psychological, social, technological, and spiritual. Through this lens, marriage and family therapists (MFTs) will learn how to consider not just the psychological and emotional dynamics of relationships, but also the physiological, societal, technological, and spiritual factors that shape the family system. The BPSTS approach provides tools and strategies for addressing complex family problems in a more nuanced and inclusive manner. This book is aimed at both practicing clinicians looking to expand their theoretical repertoire and students seeking to understand the evolving demands of family therapy in the 21st century.