The Dusk of Design explores the intersection of evolutionary theories and architectural design. Drawing inspiration from the concept of exaptation in biology, the book argues that natural selection, as the most successful designer on our planet, thrives on the diversity, variability, and redundancy of creative structures. By transferring these mechanisms to architectural design, the book contends that we can cultivate more resilient and sustainable architecture and cities in the face of environmental crises. This book seeks to illuminate the profound potential of multidisciplinarity by examining case studies from architecture worldwide. By exploring how evolutionary theories can explain various architectural phenomena, it aims to inspire architects, designers, researchers, and students to adopt a holistic and transdisciplinary approach to their work. The book provides a clear and concise overview of evolutionary principles, demonstrating their relevance to architecture.It will showcase a range of case studies that highlight the application of evolutionary theories in solving architectural challenges, such as adaptive reuse, sustainable urban planning, and resilient design in the face of climate change. Ultimately, "The Dusk of Design" aims to bridge the gap between biology and architecture, presenting a fresh perspective on how we can create more innovative, sustainable, and resilient built environments.