There’s no doubt that each book has a preferred sibling by the parents.
Bianca over Kate, Adam over Charles, and later on Aron over Cal. With each pair of siblings we see different arguments but the root problem of all of their problems is the desire to win over their parents affection. We see this first in East of Eden when Charles beats Adam to a pulp and later comes back to kill him. In Taming of the Shrew we see Kate tie up Bianca to wail on her to let her anger out. In both situations the aggressor is starting the fight because of their lust for their parent’s greater love. In East of Eden it’s because Adam’s gift to Cyrus is liked more than Charles gift which he spent a sizeable amount of money on. In Taming of the Shrew it’s because Baptista just wants Kate to be married off to whoever he doesn’t even care and he uses Bianca as leverage to get that done sooner. In both situations the parent’s prefer one over the other which causes extreme anger in the other. All anyone wants in this situation is to be loved as much as their counterpart and they are confused as why they’re not and they take their anger out on the wrong
person.
With parental preference being the fuel of each argument the parents are oblivious to the fact of the problems they’re causing and they embrace the fact that they love one more than the other. Cyrus even tells Adam: “ I love you better. I always have. This may be a bad thing to tell you, but it’s true. I love you better.” (Steinback 27). We can see the same for Baptista who shows that he favours Bianca more by paying closer attention to her than to Kate. Both parents very clearly show who they love more, even though they embrace the problems they cause by admitting them they continue to foster an obvious like over one or the other.
With both families having large conflicts going on in their lives they of course need to solve them. Eventually everything works out happily ever after but it takes some time to go from full out conflict to a mutual victory. The only way to solve these family feuds is to get a fair and equal ending or to solve them through accepting what has happened and move on. In Taming of the Shrew the main conflict is in the end solved through a mainly equal agreement. Bianca gets married in an odd way and Kate is also married. With them both being married now and being equal there is no more room for jealousy or hatred to brew. With them both being equal now they start to understand what has happened and accept the past and be able to move on.
As for an understanding way to end the conflict in these sibling rivalry relationships we can see an example in East of Eden with Charles and Adam. Once their father dies they start to realize he was the root of all of their problems and come to become friendlier with each other. He was the fuel to their arguments and the reason problems were caused. They understand that there’s no reason to be jealous of each other as they’re also now more equal. Sure they have new problems concerning their father’s money he left behind but that’s a natural conflict and not one of jealousy.
Another example of parent fueled conflicts and solving them is in East of Eden is the ongoing problems with Aron and Cal. Adam very clearly favors Aron and Cal spends a large portion of the book trying to figure out who he is and how to be like Aron, he does this just because people like Aron better and he wants to be loved like him. Eventually he reaches a breaking point similar to Charles, he gives Adam a large gift and when it’s unaccepted he finally snaps and tells Aron about their mother effectively killing him. Causing him to join the military and get killed. With Adam on his deathbed he finally forgives Cal. With Cal realizing he’s his own person and realizing they’re different and understanding they’re equal as brothers and they can each make their own decisions to shape their paths.
With parents being the main source of sibling rivalry the best ways to solve sibling rivalries is to admit the problems and be understanding about what occurred before and to move past it. Through being equal there’s no room for jealousy to grow and then they begin to be more equal and happy as a family.