Policy designers are seeking to adopt more durable climate policies that not only endure but remain influential over the long term. Amongst target groups and other relevant actors, such policies seek to nurture a belief that deep decarbonisation will happen and that they should prepare for that possibility rather than working to prevent it. Schattschneider (1935), who we quoted at the start of Chapter 1, implied that some policies become durable because they foster and sustain their own political support base through processes of positive policy feedback but may remain vulnerable to negative policy feedbacks that render them fragile.