Progress to-date towards the UN Agenda 2030 has fallen short of expectations. We undertake a model-based global integrated assessment to project future progress by 2030, 2050, and 2100 and to characterise the transformations needed to deliver the global Sustainable Development Goals and an increasingly ambitious 21st century sustainability agenda. Our results quantify the scale and pace of transformations required through eight key entry points: increasing education access, powering sustainable

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... economic development, controlling global population growth, lowering energy intensity across sectors, decarbonising energy systems, promoting healthy food diets, limiting agricultural land expansion, and reducing global emissions intensity. Our findings indicate many actions that appear to make a limited contribution to initial progress are in fact vital for accelerating change towards sustainable development later in the century.