This is a garbage CNN article about a laughable iq study that’s so bad it borders on propaganda. The study focuses on “two brothers” cohorts and makes the clai

This is a garbage CNN article about a laughable iq study that’s so bad it borders on propaganda. The study focuses on “two brothers” cohorts and makes the claim that iqs within families are on the decline, but fails to adjust for confounding factors, like the selection bias inherent in their cohort selection process. Other studies show that first borns have a higher iq than later siblings, and to a greater extent than what this study found! Iq isn’t boosted by higher education. This isn’t up for debate. Outside of malnourishment and sensory deprivation it it mostly heritable.