How many times have government leaders pledged to reduce carbon emissions or tackle the accelerating loss of biodiversity? If statements and pledges were all that it took to fix the biggest global challenges, the world would not be faced with dangerous concentrations of greenhouse gases, shrinking rainforests and extinctions at up to 1,000 times the natural rate. The reality is that it takes action on the ground to meet these challenges successfully. Action can be achieved through a variety of ways but one of the most effective is through legislation. And yet legislators have so far been on the margins of the official UN processes to tackle major global issues.