This book showcases the discussion about megaprojects carried out at the MeRIT (Megaproject Research Interdisciplinary Team) workshop 2023: the crisis, discontinuity, rising prices, and supply chains disruption force radical reflection for those involved in megaprojects. It raises a modern-day challenge, the creation of value for stakeholders. Indeed, the aim of the volume is to encourage readers to think more broadly, articulately and less stringently than the mainstream claims. There is a need to design, implement, and manage megaprojects by abandoning the old paradigm that leveraged solely on time and cost.  We need to move beyond that by going to explore the value generated, the positive impact on people, communities and territories. Economic, social and environmental sustainability takes on a new and broader articulation: issues of the circular economy applied to megaprojects are addressed and ample space is ensured for the inclusion of social needs in current practices.