When emotional intelligence (EQ) first appeared to the masses, it served as the missing link in a peculiar finding: people with average IQs outperform those with the highest IQs 70% of the time. This anomaly threw a massive wrench into the broadly held assumption that IQ was the sole source of success. 

Decades of research now point to emotional intelligence as being the critical factor that sets star performers apart from the rest of the pack. The connection is so strong that 90% of top performers have high emotional intelligence.