(SL) – The average IQ score in the general population is 100; about 118 for for a college graduate. All the U.S. presidents have higher IQs than that. But some are geniuses. Anything over 130 is considered high or a genius-level IQ. Inside Gov reports that while a high IQ does not guarantee success, it is true that intelligence is often associated with effective leaders. But does that trend hold true for U.S. presidents? Are the most successful presidents also the most intelligent?
With that question in mind, InsideGov ranked the 27 smartest presidents in U.S. history, using data from UC Davis professor, Dean Simonton. In a 2006 study, Simonton used historiometric methods to estimate each president’s IQ, analyzing information from their biographies and writings that would indicate a higher-than-average intellect.
This list is by no means definitive, but it should give a good sense of which presidents were highly intellectual. Interestingly, eight of the presidents on this list either never attended college or dropped out before finishing their degrees. President Obama was not included in the study. Let’s look at the brain power countdown.