UPDATE: Posted below
I posted about Dr. Calhoun here: The experiments of Dr. Calhoun - from equilibrium to decline
Here are two links with relevant information.
First: Global IQ: 1950–2050
Second: Dr. Richard Lynn's book Dysgenics
From the About page:
UPDATE: DERP! It is not density, it is stress. Density will stress you but there are other mitigating factors.
Just as in the mouse utopia experiment, there is no shortage of food or housing because of government subsidies.
No stress? No way!
Abraham Maslow's 1943 paper comes to mind. A large part of the population now depend on the government to provide the first two basic levels. By accepting these as a "free" hand-out, they are denying themselves the full actualization of the third level which destroys any chance of reaching levels four and five. Of course, the Federal Government is fully complicit in this as it keeps this bloc of voters meek and "on the plantation".