World leaders have promised everything to everyone. But they are failing. The UN’s Sustainable Development Goals are supposed to be delivered by 2030. The goals literally promise everything, like eradicating poverty, hunger and disease; stopping war and climate change, ending corruption, fixing education along with countless other promises. This year, the world is at halftime for its promises, but nowhere near halfway. Together with more than a hundred of the world’s top economists, Bjorn Lomborg has worked for years to identify the world’s best solutions. Based on 12 new, peer-reviewed papers, forthcoming in Cambridge University Press’ Journal of Benefit-Cost Analysis, this book highlights the world’s best policies.