You can think of it this way: the original definition of retarded/gifted was one standard deviation down/up the IQ chart. That put it at 85IQ and 115IQ, respectively. Genius would be 2 standard deviations away, an IQ of ~130. That would put uhhh ultra-retards at ~70IQ. To put this into perspective, in the early days American military forces committed themselves to a large variety of scientific studies to bring about a new age of combat, likely due in part to how well Germany was doing in that arena. One of these studies was IQ and usefulness. They found out that an IQ of ~85 was the absolute lower limit of what they could use. It was basically where the USArmy simply wasted too many resources/manpower to get *anything* out of a recruit. They literally couldn't justify using someone at or lower than an 85IQ as cannon fodder to catch bullets otherwise destined for more useful individuals. In the modern era (((scientists))) have long since moved the requirement for an official diagnosis of retarded downwards. Likely this was done to save on disability payments, back when the gov gave a fuck about that. Why? Well, because: The North American Pavement Apes are on the top end of jiggaboos around the world, in terms of IQ anyways, thanks largely in part to their large admixture of (((white))) DNA over the years. Their average IQ? 85. Yes, an IQ of *retarded* is among the moon cricket's *top average performers in the world*. In terms of comparative percentages, [here's a chart.](https://files.catbox.moe/kbjejv.jpg) And so in conclusion, when you say >a little IQ makes a world of difference. 100 IQ people and 90 IQ people live in different worlds You aren't wrong at all. In fact, you are damned near scientifically accurate.