According to social constructivists, everything we learn: our language, empirical knowledge, our sense of aesthetics, etc., in other words "culture" is learned through social interaction. First, we experience it in our environment and through our interactions with our caregivers, then we adopt it/align ourselves with it/ harmonise ourselves with it and it becomes a part of who we are.
Lieberman isn't telling us anything particularly new here, although in his book he writes about some fascinating and counter-intuitive discoveries and some of the brain areas associated with the drivers of these processes.
I'm sure for some, going off to Russia would be a great adventure. I can empathise with Lieberman's priorities; the psychological harm that absentee parents do to their children is real and significant. I've seen it for myself from over-ambitious, career-driven members of my family and the effects on their children.