My peer-reviewed article in a psychology journal on the topic of meaning and purpose in a non-religious setting is now accessible without a paywall for a limited time, so get it while it's free if you're interested. I'd be interested in hearing your feedback on it. For those curious, the article is not directly related to my Intentional Insights project, but is a part of my aspiration to raise the sanity waterline regarding religion, the focus of Eliezer's original piece on the sanity waterline.
The science on meaning and purpose, which I cited in the article, talks about how people get meaning and purpose from three things overall: self-reflection on a sense of meaning and purpose, community bonds, and serving others.
Now, it doesn't mean that other things don't contribute to meaning and purpose, such as ideology, it's that the science has not yet confirmed or denied them.
So I made sure to keep my claims narrow and based on the science, otherwise it wouldn't be published in a peer-reviewed psychology journal. Psychology journal peer reviewers don't accept speculation based on things that are not based on the science: this is not a literature criticism journal, after all :-)
Oh, dear. It's much worse than I thought.