They have no idea. This garbage is just made up. There’s no way to do an intelligence test on a deceased person, or a skeleton, or bone fragments or artifacts left behind.
Even if they could determine the average IQ drop of Europeans 2000 years ago they’d still need to know what the average IQ was before that era in order to make a comparison.
They have no idea. This garbage is just made up. There’s no way to do an intelligence test on a deceased person, or a skeleton, or bone fragments or artifacts left behind.
Even my parents with just 3rd grade education had greater intellect than many today. My Dad could do calculations in his head that I never achieved.
Maybe. Or, maybe you can look at what was the existing knowledge base of society, what was the population, what transformational changes did society invent and with what frequency, especially when compared to peer societies, and when did a society go from being a thought leader to cannon fodder.
It is an exercise where you compare them against their contemporaries, not an modern IQ test. The IQ portion is an estimate of what level of IQ would society have needed to average to make the types of transformational changes at the speed with which they occurred based on the size of the population.