The precautionary principle has become a popular principle in international
environmental law. In 1994 the Convention on International Trade in Endang
ered Species of Wild Flora and Fauna (CITES) explicitly endorsed the princi
ple, but CITES was implicitly precautionary long before that. Both the impl
icit and the explicit versions of the precautionary principle endorsed by C
ITES are open to the criticism that they rule out the consideration of fact
ors that are relevant to wildlife policy. Included in these factors is the
impact of conservation policies on human communities. This conclusion is re
levant both to the general evaluation of CITES and to any wider considerati
on of the value of the precautionary principle.