Consider you are developing a genetic algorithm with the goal of creating a cohort of entities that have the ability to pursue light. Each generation, you initialize a set of start states based on the prior generation and let things play out according to your rules. In the end, you persist those that found the light by taking their information and carrying it on in some sense in the next generation. The information of those that did not find the light is discarded.

Now, you are the author of the entire creation. At any point you can intervene in any way you want, for instance to relocate an entity that was very far from the light to be much closer to it. And you do indeed do this quite regularly. In fact a large amount of what you do as the author is go out to find the entities that are very far from the light and shepherd them back to be close to it. Sometimes, this relocation sticks: the entity sees the light, recognizes it, and continues to pursue it. Sometimes, it doesn't: the entity either wanders around aimlessly with no regard for the direction of the light, or indeed it actively pursues darkness.

At the end of the generation you have a spectrum of entities: those who never left the light, those who strayed occasionally but always took to your shepherding back, ..., all the way to those who actively ran away from the light at every opportunity. So yes, you are the author. You have complete control over how all these entitles move into the next generation, and you can save all of them if you'd like. But why would you?