"People are really, realy hungry to feel some hope about anything. The simple idea that because of challenges people face with the environment, over the next 40 years things must change is daunting. But if you say it's a great opportunity (for this generation) to build a new civilization - that generates hope. We've spent the last two decades being so discouraged and detached, that need to feel some hope is a latenet urge that has been long neglected. In the end there is no practical alternative to hope. Only a certain proportion of people are montivated by despair. The rest of us are motivated by hope."
(I ripped this out of the paper and forgot who it was quoting)