Where's your evidence of it being possible when they there hasn't been any evidence for millions of years?
"There's no evidence of there being a rubber sun god, but it can happen in the future thanks to future technology. Just have faith"
I literally directed you toward said evidence : Human sciences, especially sociology and a materialistic thinking.
Once you get, you need to look at pre-neolithic societies and observes how patriarchy actually is a system resulting from the evolutions of the material conditions of people at the time. Then, you need to look at the evolution and the creation of capitalism. Through a critic of meritocracy, you learn VERY QUICKLY that capitalism relies on a false proposition.
Remove said proposition and you will create a much better and fair system. And this is just the start.
After that, you can look at the sociological reality of crimes and do exactly what I explained last week. Once capitalism will be evaporing, ableism will dissapear slowly as well.
People will have less reason to create conflicts and you will see a much bigger reasonnances of the process of creolization. With the end of capitalism, you will see the rise of social services, especially better education system. Which will push even more the rationnalization and sociological understanding of the world by the new generations. Which will push back others systems such as neo colonialism, systemic racism, and even religions.
Really, Utopia is simply a question of attacking all the systems of oppression at the same time and rehinking the structures of society to push a new and more equal vision of the world.
ALL the evidences are in science. It's time for you to look for it and stop looking at human as monolithics.
The "Human nature" does not exist.