Knowledge, Agency, and Uncertainty
All species are reliant on ecosystems. CHANS are uniquely different from
nonhuman ecosystems because of the self-referential capacity of humans:
the extensive ability to plan, organize, and create systematic solutions
to repeatable problems—to create institutions. Contemporary societies
have a unique advantage over their predecessors in that we have a repertoire
of success and failures of past societies and, therefore, the opportunity
to learn from them (Diamond 2005). The chapters in this volume
are intended not only to summarize key developments in global human
dimensions research, but also to underscore the many uncertainties that
remain to be addressed. One of the most compelling themes to have
emerged is the recognition that uncertainties about the human drivers of
GEC trump, by a considerable margin, the uncertainties in biophysical
processes. The greater uncertainties shrouding human ecosystems are a
function of two key factors: complexity and refl exivity. Humans, more
than all other species, elaborate their ecosystems and act refl exively
within them. What might be reasonable strategies for addressing these
uncertainties?
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