I think this is more philosophy because of how formal it is, but maybe it’s sandbox material.
That which is inherently valuable is that which we seek to protect, and utopia would be comprised of that which is always too valuable for us to destroy.
Now, there is tooth and claw measure of value, which is to make everything as easy as possible to destroy (ourselves, others, objects) and whatever remains is inherently valuable - this is also known as natural selection ethics. However, the more inherently valuable existents you can preserve without wanting to destroy it, the more inherent value that exists in the system.
So, I have a tentative utopia…
We have passageways that we can manifest at will…
Like lion witch and wardrobe where they use the closet to enter a realm for thousands of years, and cone back to our world as if no time had passed much.
My utopia is that we all have our own worlds that we construct from a fragmented part of ourselves, drawn from our subconscious access to the multitude if existents out there … The major aspect is replication.
Since we all have our own worlds, we all have originals, and these originals can be replicated and summoned to our world, unbeknownst to the original, and once separated, start forming divergent memories. The most important aspect is that if they don’t want to be in your world for anything you want to do to them or any reason whatsoever, they can leave at will and join a new paradise of their own, so that you cannot even abuse the replications of others. You can also remove them from your world at will.
You can use multiple portals where no time passes to manage multiple worlds. You can replicate anything already made, food, plants, parks… You can search and search and search for stuff to decorate your world with from the vastness of all worlds, even consciously. You can set the difficulty level of your world, and you can combine elements of things to create new stuff. Basically, it’s a scenario where you add more inherent purpose for existents in the total cosmic sense.
You can shapeshift if you want, you can let others shapeshift. Basically the more tolerant you are of others, the more friends you have… For example, even your closest loved one might leave you if it’s only them and you… This is a punishment so to speak for being a jerk or a bitch. You may be able to create others from parts of your being that are fragmented, but it’s possible not even they would want to stay in your world… It’s paradise for the good, and loneliness for the jerks, until they learn their lessons … So it’s not only utopia, it’s gentle justice. This is my construct of perfection.