"Gape e bidiwa development in context kgotsa human ecology theory, ecological systems theory, ka tlhago e tlhamilwe ke Urie Bronfenbrenner e nankola mehuta e mene ya nested environmental systems, tse di nang le khuetso e e bi-directional  ka gare le magareng ga disystemo. disystemo tse nne tse ke microsystem, mesosystem, exosystem, and macrosystem. Systemo nngwe le nngwe e nna le karolo/seabe, mareo le melao e e segololo se tonna e ka bopang kgolo. Go tloga ka phatlhalatso ka 1979, seteitemente segolo sa Bronfenbrenner mabapi le theori e, The Ecology of Human Development ebile le khuetso ka bophara ka tsele ya phekelo eo dipsychologist le ba bangwe ba ithutang batho le ditikologo tsa bone. Ka ntlha ya khuetso e ya popego-theo ya kgolo, ditikologo tse — go tloga lelapeng go ya go tsa moruo le go dipopelo tsa sepolotiki — di bonwa e le karolo ya tsela ya botshelo go tloga bongwaneng go ya bogoding/kgolong ."