Tom is an ally of Dick.
Dick is an ally of Harry.
Tom hates Harry.
Harry is fairly neutral about Tom, but recognizes Tom's antipathy and resents it.
Harry has better tool making skills than anyone.
The three of them comprise the most influential subgroup.
The girls really like Tom, but don't care much for Harry.
A new kid, John, shows promise of even better tool making skills than Harry, but he isn't there yet; John is Dick's cousin.
Dick's sister, Mary, likes John, but Dick wants her to hang out with Harry because he wants some of those new tools Harry made.
Mary finds more good tubers than any of the other ladies, and they tend to do what she wants.
Tom suggests to Dick that they take out Harry and steal his cool tools; besides, John can probably duplicate those tools. But Dick knows that Mary's closest friend, Sue, has her eyes on Harry.
Social complexity?
Dude, any high school or soap opera will illustrate just how convoluted things can get.