BTS will be written into South Korea's annals of history as they are the group that successfully promoted South Korea globally through their music, highly contributed to SK's economy and piqued people's interest on South Korea's culture. Many other groups have come before them but NONE, and I mean, NO ONE, had the EXTENT and REACH of Global impact and soft power they have. They are not called Korea's National Treasure for nothing.
BTS will be part of history in the western music industry and its global domination. Just as research and studies have already been done about BTS by known and established US Universities and different professional groups, more will be conducted as professionals will try to attempt to explain the global phenomenon that is BTS.