Climate Change is the big issue. It's complex, scientific, economic and emotive, and involves everyone on the planet. There are evangelists and sceptics. The predictions they make are uncertain and probabilistic. So, if we had Interactive Democracy could the average person be trusted to decide on what is the best thing to do?
What I find inspiring by this debate is that leadership doesn't just come from those that have already decided what is the best course of action (or inaction), it also comes from teachers that show how to decide in an uncertain situation. This video by Greg Craven (with 4.25 million hits) is a great example. He shows a system of how to weight the odds (which you may use to come to your own, opposite conclusion).