Mechanical engineering professor Dr. Adrian Bejan explains how his new book takes on the hierarchy system of natural movement. He explains the gist of this theory by discussing how from an engineering point of view, evolution is possible because movement is possible, why this freedom of movement makes change possible, and how this freedom of movement and change means hierarchy is unavoidable. In this podcast Dr. Adrian Bejan, distinguished professor at Duke University and author of more than thirty books, discusses the ideas that propel his new book, Freedom and Evolution: Hierarchy in Nature, Society and Science. He explains connections between different disciplines to give a fuller picture of his idea. For example, he discusses the impact of society on science such that in technology, we talk in terms of evolution toward greater economy, easier life, and greater health. He asserts that these improvements and directions are due to changes that are possible because these moving part...