2017 Volume 55Annual Issue 5AM-Abstract Pages 419
Changes in child care environment before and after the cultural transition progressing at present era are considered. After the transition, survival rate of children and longevity of elderly reach to the limit, but medical and social supports become indispensable through whole the life. Intergenerational commitments become effective so that elderly support child care of younger generation, and younger generation will support child care of the next generation lately. Life stages will be socially designed so that future people will keep a period for child care at adequate period in their life. When such changes are achieved at a time point in future, the cultural environment become stable and the human society will last through archeological time scale.