The laws of nature are not isolated from each other. There are kinship relationships among the laws of different fields. The book organizes, classifies, and summarizes various natural laws, establishing a simple and clear taxonomy of laws. The book starts with the three major theories of ancient Greece: Democritus' atomism, Plato's universalism, and Aristotle's Organon, and explains the three ultimate laws contained within them and the three scientific methods they support. It classifies the precise laws into two major families: conservation laws and the action-reversion laws of two-body interaction, encompassing most laws in the fields of physics and chemistry. The laws in every family are isomorphic laws and apply the same general formula. The final part focuses on the laws of evolution, clarifies the logical basis of the theory of evolution, proposes an energy trigger-release mechanism that is more fundamental than the feedback mechanism in control systems, introduces the research direction of correlated group systems, and emphasizes the key role of rules in complex ordered systems. The book follows the thread of scientific development, tracing the historical background of scientific discoveries and presenting the processes of exploration, research methods, and scientists' ways of thinking.