Abstract
Among main currents of economic system thinking, a new trend of community approach is emerging along with the traditional theories of market and planned economy. Community is the kind of social systems composed of humanistic interactions among people who keep small number of common values, which are found and held by moral dialogue. The interactions are made possible through several kinds of media, by which members in a society are connected. In addition to the so-called traditional money, new sorts of media can be introduced into economic systems. The ideas of LETS, like eco-money, will develop to construct economic systems, which emphasizes community, not market.
