“Leta Hollingworth studied profoundly gifted children. She reported them as having IQs of 180+, which was a R16 score. As such, on today’s tests this equates to 159+. Her conclusion was that when IQ differences are greater than 30 points, leader/follower relationships will break down or will not form. It establishes an absolute limit to the intellectual gulf between leader and followers. She also concluded that there was an D15IQ ‘sweet spot’ of best outcomes from 123 to 144.”