The document discusses the building blocks of communication theories. It explains that theories have four main goals: description, explanation, understanding/prediction/control, and reform. It then covers some key concepts in developing communication theories, including determinism vs. free will, thrownness, objectivism vs. constructivism, law-based vs. rule-based approaches, and behaviorism vs. humanism. The document concludes that theories reflect points of view, different theories are not necessarily incompatible, and that theories have limited focus and scope.