Each year, approximately five new constitutions come into force and a further 25 are amended in some form. Despite this, most constitutions are drafted and amended by people with little or no previous experience of working on constitutional texts. So how do these drafters know how to frame, for example, freedom of religion or head of state succession clauses? These are just a couple of the issues explored by Dr James Melton of the UCL Constitution Unit in his recent presentation at OpenTech 2013. You can hear the audio from his presentation here. Enjoy!