Government interest in wellbeing as an explicit goal of public policy has increased significantly in recent years, leading to new developments in measuring wellbeing and initiatives aimed specifically at enhancing wellbeing. This book provides the first theoretically informed account of the rise and significance of this agenda, drawing on the multiple streams approach, to consider whether wellbeing can be described as ‘an idea whose time has come’. It reflects on developments across the globe and provides a detailed comparative analysis of two political arenas: the UK and the EU.