Given the current confusion of values, it would be convenient to return to nature to find possible grounds on which to build a system of common and universal values that can harmonize the various conflicting and contradictory views today. This book analyzes several classic controversies such as the conflict between materialism and idealism, the debate about the origin and evolution of life and the universe, the controversy between determinism and freedom, and the problem between the individual and the totality. As conclusion, a number of general principles of nature are enumerated, which are very useful to harmonize the different scientific, philosophical and religious traditions.