>
That's misunderstanding the reasons of how tribalism formed

>we just never caught up with our recent progress
true

>violence is a social construct
It's very real and not a social construct, it stems from conscious and unconscious mind forged from recent and hundreds and hundreds of years of evolution. It's as much biological and it is mental. But it's not an abstract construct that doesn't exist in animals.

>expand beyond our little planet
Lack of micro biology knowledge spotted.

>become pacifist creature
"You cannot be peaceful unless you're capable of great violence."
Being able to oppose something negative is a need for survival. That's why violence exist.
Any species need violence for self preservation. But it depends on the context. Most of human conflicts are passive violent conflicts which can be mitigated thought nvc.

>There will be no conflict or violence
That's impossible, but it's also a positive goal but staying it the truth is important to also about violence.
You can't end it, just mitigated it and hope it gets better over time.