The Wellbeing of Future Generations Act 2015 came into full force in April 2016. It puts a legal responsibility on the Welsh public sector, including Welsh Government, to consider sustainability in all of its actions. The potential for this to change the private sector, too, is huge. Jane Davidson was the original architect of this Act and Sophie Howe is the new Commissioner responsible for delivery. Will it change the world, or is it a well-meaning Act with no Teeth?