> absolutely zero chance of the 50th percentile IQ becoming a world class mathematician.

Good, we don't need billions of them anyway.

I wish modern society would quit focusing on individual intelligence over collective intelligence. We can take something like the microprocessor, for example. The smart group that designed the microprocessor was not the same group that designed the software nor the group the built the parts nor the group the assembled the device. However, every group is equally important.