The year 1970 gave us James Caan in "Rabbit Run" and Michael Douglas in "Adam at Six A. M.". Films with such remarkably similar themes that you have to wonder what the typical young man was thinking during those years and whether it was unique to the times.
Both films center on their title character, Harry 'Rabbit' Angstrom and "Adam" Gaines, who if they aspire to anything aspire to seeing the world in their respective rear view mirrors. Basically making a case for not getting trapped by an easily defined life. While Adam is ambitious and more cerebral about the whole thing, Rabbit just lets life take him in any random direction and then dodges any responsibility or consequence that might complicate his life. There is a lot of Kerouac's Dean Moriarty character in Rabbit, at least with regards to living in the moment and showing little remorse for any wreckage he leaves behind.
"Dean features prominently as a hero. An incredibly flawed hero who tends to abandon those who love him and feel no remorse whatsoever at his poor judgment and horribly timed actions. But a hero nonetheless".
Where Adam anticipates situations and avoids getting trapped in the first place, Rabbit is too wrapped up in himself and his immediate gratification to avoid getting trapped. Adam might fall for a manic pixie dream girl if one came into his life who meshed well with his ambitions. But no manic pixie dream girl would want Rabbit and the more dimensional and imperfect women he meets and recklessly commits to end up simply cramping his style.
Carrie Snodgrass and Anjanette Comer play his main love interests. Both give excellent performances as women tortured by their association with Rabbit. He can't give them what they need in these unequal relationships and neither seems equipped to successfully deal with life on their own. This lack of independence is off-putting to many female viewers who blame author John Updike - who wrote the 1960 novel on which the film is based - for creating such shallow female characters. This is a fair criticism as far as it goes but such people do exist and a story is not necessarily sexist just because its focus is a certain female or human type.
I think this is Comer's best performance. Her typical character is weird in a restrained way and not especially accessible or relatable to a male viewer. But Ruth Leonard is quite likable and earthy, a very regular person. She is Updike's counterpoint to Janice Angstrom (Underwood). Updike is saying that Rabbit is almost sympathetic in his aversion to his wife and his horrible marriage, a put upon hero with somewhat understandable flaws. But his advance and retreat behavior with Ruth is simply inexcusable.