These studies are naive in that they treat a species, mice, as a self-regulating unit. They aren't. No species exists absent other species. Mice have evolved alongside predators. Without predators, the external stimuli that has defined mice evolution, mice culture isn't sustainable. This has direct application not only in dense populations but in our relationship with other species. Our bodies and our culture has evo…
Human beings in some societies are reaching the point where disease, fatal accidents, and similar stressful or population-reducing effects are minimized. For example, Silicon Valley. I'm not so sure though whether it is a utopia though. Physical living space, aka real estate, in SV is certainly at a premium.
And I've seen similar cases mirroring the study's "beautiful ones", the drinkers, and rowdy youths. There are parallels and insights to be drawn from these studies of mice and men.