15 Implications for the Future: Excursuses on the Meaning of Life, AI, and Politics for the Future was published in A Basic Theory of Everything on page 450.
It is also known as a gold specie or gold currency standard widely used before World War I. In this standard, each unit of paper currency directly corresponded to a specific amount of gold in the form of gold coins. Individuals or banks could exchange their paper money for actual gold coin...