the sociobiologist e.o.wilson, from his studies of ants, showed how it was often an evolutionary advantage for a single animal to die to protect its relatives, since they too shared the same genes. moreover, it was also sometimes an advantage for an individual animal not to have offspring directly, but instead to devote its life to taking care of siblings or cousins, which again shared the same genes.

instead는 접속사로 알고있습니다.. 그런데 접속사인 instead뒤에 주+동사가 나오지 않아도 상관없나요 ??
뒤에 진주어인 to가 나와있길래 질문을 드립니다....
친절하고 정확한 답변 부탁드립니다. ~~ ^^