> IQ is Gaussian. The Big Five Personality Trait known as Conscientiousness is likewise Gaussian. For what it’s worth, human height is also Gaussian...

Height cannot be negative, thus, it is not Gaussian. IQ cannot be negative too. Great many things that most people think are Gaussians, are not.

One of such distributions that describe one-sided values, log-normal distribution (logarithms of values are distributed normally) has interesting property that for some d values x=mean+d are more probable than values x=mean-d (heavy tail). Also, sum of log-normal-distributed values does not converge to Gaussian distribution.

> IQ cannot be negative

Have you been keeping up with current events?