although most people would think about how nice it would be to decorate their apartment quickly, it should be clear that given the human tendency for adaptation, they would actually be happier if they limited their purchases and took breaks.

이 문장입니다. 해석은 얼추 되는데 중간에 있는 it should be clear that given the human tendency for adaptation를 어떻게 봐야 하는지가 애매합니다.. that given으로 시작한 것은 또 어떻게 봐야 하는지요?