OK, I’ll try a different tack with Shodan.
Shodan, I agree with everyone that any system of morality is arbitrary. We call what we like “good” and what we don’t like “evil”. So yes, everything is arbitrary and pointless in this meaningless universe of ours.
So why not arbitrarily define chopping babies in half as “good” and playing the piano “evil”? Because as human beings we are not free to choose what we like and don’t like. Take me. I love chocolate. There may be events that would change me into an entity that doesn’t like chocolate, but I’m not free to choose to dislike chocolate, I just like it, I can’t help it. I can certainly choose not to eat chocolate, I can decide to eschew chocolate, but I can’t help liking it.
Now, why do I like chocolate? Isn’t it arbitrary that I like chocolate and not boiling hot sulfuric acid? Yes and no. In a very real sense it certainly is arbitrary that I like chocolate and not sulfuric acid. I can easily imagine an entity that quaffs sulfiric acid and thinks chocolate is poison. Except that I’m not that entity. It is not arbitrary that I, a human being from planet earth, like chocolate.
Likewise, I love my wife and daughter, I enjoy fresh air and sunshine, I like certain kinds of music, etc etc and on and on. Other humans may differ from me, but they are also going to have some similiarities.
So my wants are arbitrarily given to me by the meaningless and arbitrary process of evolution. It is completely arbitrary and meaningless that an entity in the middle of Puget Sound on planet earth in the milky way galaxy likes one particular plant extract and not another. But it is true nonetheless. I like that plant extract, so it is important to me. I want to eat chocolate because I’ve learned that chocolate tastes good. Why does chocolate taste good? Because evolution provided me with certain physiological needs and limitations, and that plant extract satisfies those needs. If I were different I’d want different things…but I’m not different, and so I want what I want, and I can’t decide what I want, I am pretty much powerless to choose to want other things.
I want to live and be happy, because I come from a long line of organisms that wanted the same things, and I am similar to those organisms, because if they didn’t want those things they wouldn’t have bothered trying to live and create offspring. And so here I am. A meaningless creature with meaningless wants. But those wants are real nonetheless, I don’t stop wanting them just because I exist in an uncaring universe.
Now, as a particular type of animal from a particualar place with a particular evolutionary history, I find I am a social organism, I am pretty much required to live with other humans. And so I have some given needs that only other humans can supply. So in order to get my needs met, I also find I have to satisfy the needs of other humans. Utterly meaningless I know, but I have no choice if I want to live, and I have no choice about wanting to live, I HAVE to want to live. And so I try to figure out ways of living alongside these humans. And they try to figure out how live with me. And so we work out some mutually agreeable rules.
And those rules are ultimately meaningless, since it is meaningless whether I get along with the other humans or not. Except that I can’t not care, I’m obligated by the sort of creature I am to want to get along with the other humans, and so I have try. See, although I recognize intellectually that the universe is meaningless and my efforts to be happy are meaningless, I can’t help but act otherwise because that is the sort of creature I am. And because of the way creatures are created by evolution, most creatures would have to be pretty similar in that they consider their lives important, even if they prefer sulfuric acid to chocolate, or lay their eggs in a hole and leave them rather than spending 18 years caring for an extremely altricial offspring.
I think what bothers Shodan so much is that we humans have an intuitive sense that our lives are meaningful, yet if we believe in a meaningless universe then our lives can’t be meaningful. So atheists should just curl up and die if they really believed it. So why don’t I curl up and die? Because I don’t WANT to, and I don’t want to because I’m a human being with a particular nature that I didn’t choose, and that nature is to want to live no matter if the universe is meaningless or not.