_

every progress made by science and technology, from which we have increased our happiness on the earth, actually threatens the prospects of our successors.

밑줄 친 부분... 콤마 뒤에 왜 전치사 from이 나왔는지 가르쳐주세요......
차근차근 분석하며 친절한 설명 꼭부탁드립니다ㅜㅠㅜㅠ