The World Inequality Lab has launched the Global Justice Report: a Plan for Equality and Prosperity Within Planetary Boundaries, during the opening of the World Inequality Conference 2026. The report sets out a new vision for global progress in the 21st century: grounding human development and equality in planetary habitability. It explores the conditions under which the world could move toward this horizon and traces an economically and ecologically consistent transition path from 2026 to 2100.

Its main conclusion is simple: a global transformation that reconciles planetary habitability and high standards of well-being for all is possible – as long as three conditions are simultaneously met. Fast decarbonization of energy systems is required. But we also need a major shift away from overconsumption towards “sufficiency”. This would involve a sharp reduction in labour hours and raw materials extraction, along with big changes in consumption patterns, food habits, land use and forest cover.

Financing and politically sustaining decarbonisation and sufficiency will require a drastic reduction in inequality of income, wealth and power, both between countries and within them. This reduction of global inequality is compatible with deep decarbonization, indeed, it is a necessary condition for shared prosperity on a finite planet.

The Global Justice Report is the first attempt to propose a fully quantified plan for this transition. It combines four dimensions that today’s debates often treat separately: redistribution at the world scale, a deep reform of the international financial and economic order, a radical transformation of energy systems and substantial shifts in consumption patterns. Compared with most climate scenarios (including the IPCCs), the main novelty is that we model all four dimensions together and place inequality and sufficiency at the centre of the analysis.