I just started reading a collection of Wendell Berry's essays and came across this paragraph from "A Native Hill." I think it's the clearest reason for me why the answer to this question is obviously yes for the wild animals of the world:

"In spite of all the talk about the law of tooth and fang and the struggle for survival, there is in the lives of the animals and birds a great peacefulness. It is not all fear and flight, pursuit and killing. That is part of it, certainly; and there is cold and hunger; there is the likelihood that death, when it comes, will be violent. But there is peace, too, and I think that the intervals of peace are frequent and prolonged. These are the times when the creature rests, communes with himself or with his kind, takes pleasure in being alive."

For those wondering: various demographic researchers (including the Population Reference Bureau) estimate that roughly 117–120+ billion humans have been born in all of history. o1 thinks the # of humans after = # of humans before date is about 1 AD. I was curious what number of humans had access to the relatively nicer lives that we do now. But that is assuming those lives under hunter-gatherer were worse, which might not be true! Anyways, this seems like a v hard question to answer. I wonder if the expected value of all the future humans counts yet.