Civil society finds itself at an inflection point. The next decade will see billions of people elevated from poverty and the creation of a vast new population of aspirant middle class people in emerging economies in the Global South. If the right conditions are in place, these people could become the driving force behind a global upswing in the fortunes of civil society, helping it to address some of the most pressing issues of our age. This report details the enormous potential of that engagement and finds that by 2030, were the world's middle classes to dedicate just 0.5% of their spending to charitable causes it would amount to an astonishing $319 billion per year for much needed causes. However, it also identifies a number of barriers that need to be overcome if we are not to waste this one-off opportunity. Finally, this report makes a series of recommendations for how this can be achieved.