Four years after the first UN Food Systems Summit, the world is still hungry for progress, write Shakuntala Haraksingh Thilsted, Chair, UN Food Systems Coordination Hub’s Scientific Advisory Committee and 2021 World Food Prize Laureate, and Ismahane Elouafi, Executive Managing Director, CGIAR. Four years ago, the UN convened an ambitious world-first Food Systems Summit to inspire countries to transform their food systems — from production to consumption to waste — to become more equitable and sustainable. Ethiopia has identified 24 game-changing solutions to support food systems transformation, including strengthening climate-smart livestock supply chains. One option would be to integrate food systems reform into climate finance to fund double-duty initiatives that both reduce emissions and enable climate-resilient food systems. But science has been the constant backbone of progress towards healthy, equitable and sustainable food systems for all.