In recent months young people across the world have been going on strike on Fridays to protest about their governments’ failure to adequately address the climate crisis. In their view, lack of political action to protect the climate is putting their future in jeopardy. But Wales is leading by example here with a law passed in 2015 that echoes the demands of the Fridays for Future protesters: the Well-being for Future Generations Act. It requires public authorities in Wales to consider the long-term effects of their decisions and make sustainable development a touchstone for policymaking.