“You can choose your friends but you sho’ can’t choose your family, an’ they’re still kin to you no matter whether you acknowledge ’em or not, and it makes you look right silly when you don’t.” – Harper Lee To Kill A Mockingbird 
Sibling rivalry has been the core of many family disputes throughout time. It is the base of having a brother or sister, or both in which arguing and fighting can occur on a daily basis.

Getting attention from the parents is a vital attribute where the child is hungry to receive from a early age. When another child is brought into it, the competition begins. 

The new born becomes the centre of attention. “The first born child” lets call them in this case, is finally given a bit of freedom where they are able to observe from a distance. The new given space is a unusual time for the child as they are now given an area to explore on their own.

However, the freedom of space is not what the child desires they want to be seen as the main child in their parents eyes. 

The child will now do anything to get the attention, even if this means getting in the bad books of their parents. Being loud and obnoxious is their main agenda. 

However, when the child grows up they will finally realise the importance of looking over their sibling(s). 

The rivalry will always be there, in whatever way, shape or form. This will maintain the base of their sibling rivalry. You can only learn from your mistakes, try and resolve them and then finally move on.