The IQ scale is restandardized every few decades to keep the mean at 100. This is because for as stupid as it seems people are right now, the average IQ in Western White populations has been jumping every generation and most people today might qualify as geniuses during the original tests.

It seems people are a lot dumber right now, but that's because the sheer level of information being given to us and then forced to be dealt with has our brains consistently burning out (especially people with dopamine chasing addictions). Which makes us far easier to manipulate and much more automated in our thinking. The constant bombardment from every angle in every single day from the moment we can talk and read has us stretched far too thin and taught us that we must constantly rely on our subconscious snap decisions for most thoughts (for example, this is how stereotypes are created and maintained). Industrial Society and its Consequences, and all that.

What makes that interesting, is that most non-white populations have not been growing, and have been either stagnant (meaning they drop when the restandardization happens) or actually dropping. Which is what is causing this effect, the immigrants and certain PoCs are so clinically retarded that they are negating any upward mobility the rest of us might have.

The cutoff for being literally mentally retarded is 75, most of Sub-Saharan Africa and Central America is in the 50s and 60s. Entire nations with profound retardation that are allowed full existences without any restriction. North Africa, South America and the Middle east are in the low 80s, meaning they are just barely above being classified as retarded themselves.

Now imagine massive unchecked immigration from those nations being brought into our country, and then allowed to interbreed (IQ is hugely genetic) or assimilate (meaning standards lowered to accommodate them as the norm). It'll destroy anything.