The 2030 Agenda for Sustainable Development aims to forge a more equitable and sustainable world by integrating peace and development efforts. Despite this ambition, challenges persist as these initiatives often operate in isolation, limiting their collective impact. Moreover, the most affected populations by conflicts find themselves trapped without resources or capabilities. The lack of development often exacerbates underlying conditions, leading to recurring conflicts. The question arises then: How can vulnerable groups overcome these barriers collectively?

The Social and Solidarity Economy (SSE) emerges as a transformative approach to achieving peace-centred sustainable development. SSE is a people-centred and nature-responsible economic model characterised by voluntary cooperation, collective goods, local action, and democratic governance. Additionally, SSE initiatives contribute significantly to achieving various Sustainable Development Goals (SDGs), fostering resilience, promoting well-being, and reducing inequalities. Although SSE is revolutionary in its principles, it has yet to be studied in an interdisciplinary manner within peace and conflict studies. This review article explores the potential of integrating SSE into peacebuilding and development agendas. Our study provides policy recommendations to enhance the impact of SSE on achieving the SDGs and promoting peace. We also identify barriers and limitations, advocating for an integrated approach to ensure collective and solidarity-driven development.