Intergenerational relations are central to United Nations frameworks, emphasizing the importance of equity and dialogue between generations. Key documents like the 1994 Programme of Action and the 1995 Copenhagen Declaration highlight the need for social security systems that promote intergenerational equity and recognize the contributions of all age groups. This paper, created by the five regional commissions of the United Nations, examines the social and economic impacts of demographic shifts towards multigenerational societies. It reviews current data on demographic trends, labor markets, social protection, care, living arrangements, and digitalization across different regions. The paper offers recommendations for building inclusive societies for all ages, addressing intergenerational relations from multiple perspectives while acknowledging regional differences.