Fifteen years into the development, there is now a significant literature that demonstrates epistemological, methodological and political shortcomings attendant to its deconstructionist project.
However, methodological difficulties have hampered behavioral research, especially on the forest dwelling species, because their secretive behavior and cryptic coloration make them difficult to follow for continuous observation.
Man-made threats such as nuclear war or nanotechnology are harder to predict than natural threats, due to the inherent methodological difficulties in the social sciences.
