This is yet another great FeelGood movie about "the Swinging Sixties and aftermath" as for Across the Universe , which in part "talks back" to this movie.
The main character [do Americans call it the protagonist?] William has an older sister who grew up in the late 1960s at the same time as the characters in Across the Universe, and it is she that uses her record collection to instill a love of "rock and roll" into William.
So the events of this movie take place some 5 years after those in Across the Universe and the director Crowe makes it very clear that the absolute magic years of the late 1960s have passed and we have crossed over the line of 1970 when the feminist movement took over the world.
Crowe creates a character called Elaine who is a facsimile for Germain Greer as the pseudo-professional activist in the "I am woman hear me roar in numbers too big to ignore" in yer face Feminist Revolution that was to alter the whole fabric of society via attacking the so called Nuclear Family, with the results chronicled in the 1999 movie American Beauty.
Crowe spends some time showing, via Elaine, the methods used by the Feminist Movement and I will explain all that below.
As for Across the Universe [see my blog]
the movie can be enjoyed on a superficial level by "young" folk [ie
under 60] simply as a "feelgood, coming of age in a former great age"
movie, or those who "were there" can delve into the deeper meanings.