Are you suggesting it can't be because a a squirrel doesn't run in front of a car or that it can run faster than a fox?
No. I was suggesting that you've gone off on an irrelevant tangent when you asked what kinds of factors contribute to reproduction and hence "fitness."
On average each generation will necessarily be more fit than the previous if survival of the fittest really drives a gradual change in species.
Generations don't compete with one another. Individuals in populations do, and fitness doesn't reside in any one of them. It refers to relative reproduction rates and allele frequencies in gene pools.
If females choose brighter colors or stinkier mates then that isn't necessarily "fitter" but it will still tend to exist more in ever6y subsequent generation.
You're describing evolution. You're describing the action of natural selection on genetic variation which leads to changes in populations over generations.
I'm not talking about single celled life because it is irrelevant. I'm talking about a higher level of consciousness than a dust mite.
I've never understood what you're trying to say about consciousness. As I've told you several times, I don't know what the word means to you, so there can be no discussion of the topic.
Everybody makes perfect sense.
Yet you told me that everything I write is illogical and non sequitur to you. If you've been paying attention, you've seen quite a bit of discussion about YOU not making sense to others, much in the last 2-3 pages. The problem for you created by your refusal or inability to engage others is their discussion goes from being with you to being about you. They just lose interest in trading words with you.
A topic I post on from time to time is thinking about what's in it for the other guy. What do you bring to the table that will interest him or her? I've tried to reach out to you a few times - recently on this thread. You don't acknowledge seeing it. Then you're bemoaning that nobody will play with you. Nobody will answer your questions. That's not going to change if you don't. Why aren't you eager to get help from others? There are people here that can make a positive difference in your life if you'll consider and test their suggestions, but you have to reach back to them.