Post-Normal Science is a concept developed by Silvio Funtowicz and Jerome Ravetz, attempting to characterise a methodology of inquiry that is appropriate for cases where "facts are uncertain, values in dispute, stakes high and decisions urgent". It is primarily seen in the context of the debate over global warming and other similar, long-term issues where we possess less information than we would like.On the one hand, we desperately need a well-thought out, mutually agreed-upon approach to such cases. On the other hand, Ravetz seems to be working hard to justify action in the absence of certainty--and since his primary example of post-normal science is the global warming debate, it's hard to tell whether PNS is a real step forward in the sociology of science or just another skirmish in the global warming wars.
Ravetz makes one suggestion that seems very useful--he calls for an "extended peer review system" that includes all "stakeholders" in the process, whether or not they share the dominant scientific paradigm. This is a timely suggestion, given the growing power of the "blogosphere." A mob of "bloggers in pajamas" exposed forged political documents in 2004 and quickly picked apart the mass of "Climategate" emails. This "Army of Davids" (to use Glenn Reynolds' phrase) is here to stay. We may as well build them into any future plans for science and public policy!