So my experience is a bit different as I had teen mom with ~5-7 year gaps between each siblings. Personally gaps are real nice if you have a choice. Less competition. But I think the real answer is team activities that are not competitive. I played comp stomp with siblings regularly. Taught my brother to play rts at 3. We still play together 25 years later. My youngest sibling just wants to do their own thing and the older ones didn’t encourage playing together so she’s more of an outsider. I remember she complained about it when she was like 5 but I wasn’t around much then to force it. I told the others to step up but they never did. If they did I wonder of things would be better between all of us.

Be the common enemy.

Give them a common enemy.

Give each a knife.

The survivor will not hate his/her sibling anymore.

Love them both for who they are and never compare them.

Don’t make them compete for your respect and affection.

Sometimes time is enough. I’m the 3rd of 4 with my eldest sibling being 10 years older. The other 3 of us are close in age, so through middle school and early highschool, we were shits to each other. Nothing crazy but we were all teens. Once we were all in high school, we all got along a lot better and that’s only got better over the past couple decades.

We were raised to respect people and be generally not shitty. We were all treated equally and nobody was spoiled or favored. I think those are the most important facets plus the friends we hung out with. Shitty friends will bring anyone down, speaking anecdotally. A strong foundation of understanding how to be respectful and what’s right and wrong has certainly saved my younger brother and I from going down really bad paths.

According to a certain website if you add a “step” to their title, they get along REALLY well.

What !? Siblings hating each other seems exceedingly rare in my personal experience 😅

give one to a senator and the other to some farmers in the desert
may lead to accidental incest

Me and my siblings have pretty much always got on, apart from some normal squabbles when we were kids. They’re legit my favourite people to hang out with. I’m not sure exactly what my parents did to make this happen. I guess they treated us equally with love, respect, kindness and an excellent sense of humour.

They’re their own people, it’s just a dice roll.

Strive for equality of treatment.

Growing up my sister and I didn’t get along when we were younger, she wanted to give me back to the hospital when I was born.

Over time we shared some similar interests, she played violin, I played cello. She pursued it to a master’s degree, I quit to have less divide attention on school which I also failed at.

My parents always gave us options for what we wanted to try and despite her getting more financially to cover those things, I knew I could have those things as well if I asked but I wanted them on my own.

By our early teens any anger was over and was got along for the rest of her life when she died of brain cancer at 42.

Not being a psycho POS will go a long way.

I have kids. I don’t know why hating each other would be a given when raising them. Not my experience with my own kids or other families I know, apart from the usual angsty teen period kind of stuff.