Vienna.
The final plenary session at Challenge Social Innovation 2011 for today begins with Geoff Mulgan, whose brief is to outline a range of social innovation theories. He begins by posing a question: how do we know whether such theories are right or wrong? How can we test them – especially perhaps in such an emerging, novel field? Social innovation seeks to address certain problem areas – poverty, climate change, social exclusions, … –, and so by its nature is a sprawling field; the questions we must always come back to are what do we need to know, and how …











