Focusing on the scientific study of communication, this book is a systematic examination. To that end, the natural, social, cultural, and rational scientific perspectives on communication are presented and then brought together in one unifying framework of the semiotic square, showing how all four views are interconnected. The question of whether the study of communication can be considered a unique science is addressed. It is argued that communication is never separate from any object of study and thus we always deal with its manifestations, captured in the four scientific perspectives discussed in the book.