Milena Sterio, American expert of international law, includes the former axis powers (Germany, Italy and Japan) and India among the great powers along with the permanent members of the UNSC. She considers Germany, Japan and Italy to be great powers due to their G7 membership and because of their influence in regional and international organizations.  Various authors describe Italy as an equal major power, while others view Italy as an "intermittent great power" or as "the least of the great powers".
Why does Milena Sterio consider UNSC members great powers?