Speaking of ancestors, I think it is unfortunate that so many are unaware of what they found to be true about happiness, and what happiness is, and what it isn't. I am not impressed by evolutionary psychology and its superficial and half-baked just-so stories. Biology and psychology can give us hints and signs about things which are then folded into any sound account of the human person, but it is just that: information that enters into a fuller account. Very often, we don't even have that. We have unsophisticated intellectual dilettantism and amateur dabbling.

We must first determine what happiness is before it makes sense to talk about how to achieve it. Aristotle, Thomas Aquinas, and others in the Western tradition have much to say about it [0]. They also have much to say about how to attain it. It make sense to start there.

[0] https://www.simonandschuster.com/books/How-and-How-Not-to-Be...