I think the deciding difference is that the amount of fans and supporters who want to be actively involved and who think the problem is the most important in the world is much larger than the number of researchers; while popular physics book readers and nature documentary viewers are plentiful, I doubt most of them feel a compelling need to become involved!
I think the deciding difference is that the amount of fans and supporters who want to be actively involved and who think the problem is the most important in the world is much larger than the number of researchers; while popular physics book readers and nature documentary viewers are plentiful, I doubt most of them feel a compelling need to become involved!