Actually I remember Sociobiology was in the upstairs landing library next to Erich von Daniken's Chariots of the Gods. You would do well to read James Flynn's book "Are we getting smarter". It explains why you are slipping into a stage IV. Here is an easier to digest summary: "What becomes of low- and high-IQ adults when they’re old? The answer is complex. Verbal intelligence peaks in middle age, then slowly declines. But there is a substantial “bright bonus”: People with high IQs decline far less than people with low IQs. If you’re in the top percentiles of the population, your verbal intelligence will be about as good in your 80s as it was in your teens. For analytical intelligence, however, there is a massive “bright tax.” People peak in their teens, then decline. The higher their initial IQ, the greater the atrophy. The most analytically powerful teens end up being the most analytically powerful retirees, but even the brightest eventually become mediocre."