Friends are Electric

One of the most important messages of Thus Spoke Zarathustra was that you cannot regret. Regret means you hate something you have done. In the philosophy of Nietzsche, you are a sum of your actions and choices, as the outcome has made who you are. If you had chosen otherwise at the time, you would be someone else entirely, since it is experience that defines a person.

You are allowed to say that, given a similar situation now, you would behave differently, since you are not the same being you were at the time of the earlier action. But when examining what you did in the past with the knowledge you had at the time, you must decide on the same course of action you took then. You must reaffirm what you have done in the past. He called this eternal return or eternal recurrence.

It is thus obvious, by this philosophy, that the past is important in defining a being. Anyone denying the path dependence of the human mind is lacking an understanding of the humanity.

Thus, the fitness function which defines what is most ideal for a given person is dominated by individual dependencies, while still having some effect from general, group effectrs.