I think that we know, in general, what brings people some degree of satis action. And so it's harder to be satisfied with your life when you're struggling for survival,. When you don't know where your next meal is going to come from. So you have to get past the struggle for survival. Once you do that, i think the evidence is pretty clear that what gives people enduring satisfaction is people whom they love and people who love them. No matter your age, that's what people should be aspiring to.