We know that economic growth and climate action can be achieved together. The Energy Transitions Commission was convened to help identify pathways for change in our energy systems to ensure both better growth and a better climate. This is inspired by the work of the Global Commission on the Economy and Climate and its flagship project the New Climate Economy. The Commissioners bring a remarkable range of viewpoints and extraordinary depth of experience. They come from across the energy spectrum, including investors, incumbent energy companies, industry disruptors, equipment suppliers, non-profit organizations, advisors, and academics. Some have sat at high-level negotiating tables on climate change deals. What they share is a progressive attitude to reforming the energy system. We aim to accelerate change towards low-carbon energy systems that enable robust economic development and limit the rise in global temperature to well below 2 degrees Celsius. We will provide decision-makers with insights and options for action at local and/or sector level. This will stem from objective research and wide engagement with actors in the energy system. We hope you find the work of the Commission interesting and insightful.