1934- africa agriculture antiquities argentina aridregions aspectdel'environnement biography buenosaires bus072000pol044000 business cattlebreeders cattleherders changements christianity climat climaticchanges congresses corbett descriptionandtravel development east eastern economicaspects economicconditions economics environmentalaspects environmentalconditions environmentalpolicy ethnology excavations(archaeology) goats histoire history hornofafrica humanecology istria(croatiaandslovenia) jim nomads pastoralisme pastoralsystems patriarchy politicalscience prehistoric prehistoricpeoples publicpolicy quakers religiousaspects sanctuarymovement simplicity socialaspects socialchange socialconditions sociallifeandcustoms sonorandesert spirituallife sub-saharan sustainabledevelopment unitedstates wilderness(theology)