This panel paper by Jan Bonenkamp (CPB), Lex Meijdam (TiU), Eduard Ponds (APG & TiU) and Ed Westerhout (CPB) discusses the virtues of collective intergenerational risk sharing (IRS). The combination of trends in society highlights the important lesson that an IRS arrangement needs to be open for flexible adjustments to changing preferences and circumstances: collective pension arrangements must be reinvented. This paper proposes the development of new forms or arrangements of intergenerational risk sharing.