This book aims to contribute to the essential and ongoing discussion on age, ageism, population ageing, and public policy. It attempts to demonstrate the breadth of the challenges of this subject by covering a wide range of policy areas, from health care to old-age support, from democratic participation to education, from family policy to taxation and fiscal policy. Its short, incisive chapters bridge the distance between academia and public life by putting in dialogue fresh philosophical analyses and new specific policy proposals. The book's contributors provide a multidisciplinary discussion, with authors from backgrounds in philosophy, political science, sociology, economics, and law, approaching familiar issues such as age discrimination, justice between age groups, and democratic participation across the ages from novel perspectives. The book is especially timely in light of the ongoing process of critically scrutinizing our societies from the perspective of injustice and discrimination as well as the increasing societal problems posed by population ageing.