How to Stop Siblings Fighting (Without Becoming the Referee)

It starts over a chair. Not a favourite chair, not a contested chair — just the chair that one of them was sitting in eleven seconds ago. By the time you arrive, both children are shouting a version of events you cannot possibly verify, and both are watching your face to see who wins.

That last part is the whole problem. When a parent adjudicates, the argument stops being about the chair and becomes about your judgement — which is a far more valuable prize and therefore worth fighting much harder for.

What siblings are actually fighting about

1. 01
   Access to you

   Attention is the scarcest resource in most homes. Conflict reliably produces it, which makes conflict a highly effective strategy.

2. 02
   Fairness, as they experience it

   Children track fairness with forensic precision and almost no context. Equal is not the goal; understood is.

3. 03
   Regulation, or the lack of it

   The four-o'clock argument is a blood-sugar and fatigue event dressed up as a moral dispute.

4. 04
   Rehearsal

   Home is where children practise conflict with people who cannot leave. Uncomfortable, but developmentally useful when it is coached.

What to say in the first thirty seconds

“Siblings are not fighting for the chair. They are fighting for the certainty that there is enough of you to go round.”

Sian Trombley

The changes that reduce frequency

• Ten minutes of separate, undivided time with each child, most days.
• Fix the four-o'clock window: food, quiet, no shared screens for twenty minutes.
• Give each child something that is genuinely theirs and does not have to be shared.
• Praise repair louder than you correct conflict — "you sorted that yourselves" is the sentence you want them chasing.
• Never compare them out loud, including favourably.

When to seek help

Speak to your GP or a family therapist if one child is frightened of another, if aggression causes injury, if conflict is constant with no warmth between episodes, or if one child has begun avoiding being at home. Persistent sibling aggression is treatable, and early support changes the trajectory of the relationship.