A great many people believe that one of the primary barriers to action on climate change is the existence of a cadre of "climate deniers" -- people who refuse to accept the now-overwhelming scientific evidence for anthropogenic climate change. There is a great deal of tortured introspection among people in my circles about how to reach the deniers and bring them around to reality. (Seriously. You should see some of the email threads.)
Most climate hawks have finally moved past the "deficit model," the notion that the solution to climate skepticism is to pour more facts on the pile or repeat the science more slowly and loudly, like an American tourist overseas. But the implicit assumption that the road to climate progress runs through the hearts and minds of the doubtful remains intact.
Over time, I have come to disagree. I don't think the climate deniers will ever change their minds. What will happen is that they will, to put it bluntly, die off. We might wish it otherwise, but I fear that change on climate -- real change, non-linear change -- will not happen until the generational cohort in which climate denialism is concentrated begins passing into the sweet beyond.