Introduction

Conflicts of interests and their coordination among multiple generations are called intergenerational issuesIntergenerational issues. These are new problems that have emerged with the increase in human power. Four challenges in the context of intergenerational issuesIntergenerational issues are raised: (i) the temporal location of future people, (ii) ignorance about future generations, (iii) contingency of future people, and (iv) difficulties in realizing intergenerational ethics. Of these, this book focuses primarily on the fourth issue, that is, the difficulties in realizing intergenerational ethicsIntergenerational ethics. Three characteristics of the approach of this book are raised: (i) the joint work of two disciplines, philosophy and economics, (ii) use of economic experiments, and (iii) variable preferences of generations. An overview of each chapter and the overall flow of this book are presented.