Intelligent and very bright people do not always do well, especially in leadership roles. GENERAL mental ability (42,3 percent) is the best predictor of individual employee performance followed by job knowledge (23 percent) and integrity (21,2 percent). All the other factors such as qualification and experience only contribute less than three percent. Despite this evidence from scientific research, we find that intelligent and very bright people do not always do well, especially in leadership roles. What could be the problem? The problem is leadership derailment which takes place when individuals seemingly with high potential fail to realise that potential due to personality flaws. While this problem affects individuals at all levels in the organisation, and generally…