Public policies are the instruments through which our values are authoritatively allocated across our society. Policies are the ways governments can bring about ends that affect how we interact with each other. How do you measure success? When it comes to policies, you have to measure it relative to the initial intention of the policy. For policies to be successful, they should have clear and achievable goals, and meet those original goals. Think about the 2002 plastic bag levy. Before the policy was brought in, Ireland used 1.3 billion plastic bags, some 5 per cent of all our litter. The…