Whereas(~임에 반하여)tribal economies are often correctly described as cashless, subsistence based, and simple in technology, / these obvious [contrasts to/ resemblances with]the commercial system alone [do/ does]notexplain their(=tribal economies)achievements.
➔ 부족 경제의 특징은 현금이 필요하지 않고, (의,식,주 처럼) 생존을 기본으로 하며 기술이 단순하다.