8 karma · joined August 29, 2020
Random fixation and/or founder effect, among a myriad of effects that don't involve natural selection.
>Let's say for instance that a species of ant is known to be more aggressive, why it was that way is probably generic drift. Why it stays that way is because of its environment, and it is selected for.
Or the different alleles for aggressiveness (whatever that means, and assuming they exist) got fixed due to drift? Who knows. The burden of proof is on the adaptationist to show that something other than contingency happened.
>Brute forcing the genome to something better is clearly possible, but if you converted all of the matter in the visible universe into DNA and mutated every strand a trillion times a second for a trillion years, it's very possible you would never even encounter a viable strand of DNA for that organism.
Yes, but consider the following. I just ran:
>>> np.random.random()
0.8867453976799686
What were the odds that I ended with this specific 18-digit float in the whole set of floats in [0.0, 1.0)? And yet, here we are.
The word you're looking for is contingency. Gould spoke much about "replaying life's tape" and how it would yield different results every time it was "replayed". Interestingly, people have actually attempted to put this thought experiment into practice at a very prosaic level [0] [1]. They find that although there are convergent patterns of adaptation, over the long term populations diverge considerably.
[0] https://science.sciencemag.org/content/362/6415/eaam5979
[1] https://sandwalk.blogspot.com/2019/09/contingency-selection-...
>Of course it doesn't come with the prestige and the network, but honestly is that really worth a quarter million dollars?
Of course it's worth it. These are the kind of connections that guarantee you a job worth far more than that.
[0] https://sandwalk.blogspot.com/2019/08/evolution-by-accident....