A Theory that any Organism is a Single Chemical Molecule focuses on the reactions, transformations, properties, technologies, and approaches involved in the study of molecules. The book first underscores the reasons in saying that a multicellular organism is in reality fundamentally unicellular. The text then elaborates on the molecular conception of organisms, including unicellular plant organism, multicellular plant organism, and a unicellular animal organism and a multicellular animal organism. The publication also highlights the molecular conception of neoplasms. The manuscript also takes a look at the explanation of other activities in an organism by the molecular theory. Discussions focus on embryonic development, animal heart, movement, pleasure and pain, and mind. The publication is a reliable source of data for readers interested in the structure and composition of organisms.