Theoretical Geomorphology is a specialized book that focuses on the surface features of the Earth, categorizing them into endogenic and exogenic characteristics. While endogenic features arise from processes within the Earth, exogenic features are shaped by external influences. This book complements the author's previous works that deal with geodynamics and systematic geomorphology. It provides a theoretical foundation for understanding the exogenic processes that can often be directly observed, such as river dynamics or the development of coastlines. The author aims to present a coherent representation of theoretical geology that clarifies the mechanisms of exogenic processes more distinctly than the often speculative aspects of geodynamics.