I believe you're thinking of Williams Syndrome:
https://en.wikipedia.org/wiki/...
"Among the hallmark traits of people with Williams syndrome is an apparent lack of social inhibition. Dykens and Rosner (1999) found that 100% of those with Williams syndrome were kind-spirited, 90% sought the company of others, 87% empathize with others' pain, 84% are caring, 83% are unselfish/forgiving, 75% never go unnoticed in a group, and 75% are happy when others do well.[39] Infants with Williams syndrome make normal and frequent eye contact, and young children with Williams will often approach and hug strangers. People affected by Williams syndrome typically have high empathy, showing relative strength in reading people's eyes to gauge intentions, emotions, and mental states.[40] The level of friendliness observed in people with Williams is often inappropriate for the social setting, however, and teens and adults with Williams syndrome often experience social isolation, frustration, and loneliness despite their clear desire to connect to other people.[37]"
It's a little more involved than just 3 genes, though, and there are multiple drawbacks (more than just what was mentioned in the quote above).
I've long thought that if sentience as we know it is to survive in our tiny corner of the galaxy, we will have to either become a different species or be replaced by one. However, the idea that we could/should do this intentionally will very quickly come up hard against the strong resistance to anything with the slightest whiff of eugenics. I'm not sure there is a good answer to that, honestly. The whole thing seems like somewhat of a catch-22 to me.
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We will soon have the option to harvest our farts, so we can post & comment on stats about them.
