If the crystalspheres had not existed…

I thought about it that night, as I stared up at the shimmering, pale light from the drifting Shards, through which the brighter stars still shone.

If the crystalspheres had not existed, then there would come to each galaxy a first race of star-treaders. Even if most intelligences were stay-at-homes, the coming of an aggressive, colonizing species was inevitable, sooner or later.

If the crystalspheres had not existed, the first such star-treaders would have gone out and taken all the worlds they found. They would have settled all the waterworlds, and civilized the smallbodies around every single goodstar.

Two centuries before we discovered our crystalsphere, we humans had already started wondering why this had never happened to Earth. Why, during the three billion years that Earth was “choice real estate,” had no race like us come along and colonized it?

We found out it was because of the deathbarrier surrounding Sol, which kept our crude little ancestors safe from interference from the outside… which let our nursery world nurture us in peace and isolation.

If the crystalspheres had not been, then the first star-treaders would have filled the galaxy, perhaps the universe. It is what we would have done, had the barriers not been there. The histories of those worlds would be forever changed. And there is no way to imagine the death-of-possibility that would have resulted.

So, the barriers protected worlds until they developed life capable of cracking the shells from within.

But what was the point? What benefit was there in protecting some young thing, only for it to grow up into bitter, cramped loneliness in adulthood?