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Leopold and Loeb vs William James Sidis

Who Was the Greater Genius? A Complete Comparison

Leopold and Loeb
IQ200
Born1905
Died1971
OriginChicago, Illinois, U.S.Chicago, Illinois, U.S.
Known ForBeing murderer obsessed with committing the “perfect crime.” Their murder of a 1
VS
William James Sidis
IQ250
Born1898
Died1944
OriginManhattan, New York City, U.S.
Known ForThe Animate And The Inanimate

About Leopold and Loeb

Two wealthy students at the University of Chicago who in May 1924 kidnapped and murdered 14-year-old Bobby Franks in Chicago, Illinois.

Read full biography of Leopold and Loeb → · In-Depth Article →

About William James Sidis

American child prodigy

Read full biography of William James Sidis → · In-Depth Article →

The Verdict

Based on estimated IQ scores, William James Sidis (IQ 250) ranks higher than Leopold and Loeb (IQ 200). However, both made extraordinary contributions.

Frequently Asked Questions

Who had a higher IQ — Leopold and Loeb or William James Sidis?

Leopold and Loeb had an estimated IQ of 200 while William James Sidis had an estimated IQ of 250.

What is each genius known for?

Leopold and Loeb is known for: Being murderer obsessed with committing the “perfect crime.” Their murder of a 14 years old was the inspiration for Alfr. William James Sidis is known for: The Animate And The Inanimate.

Are both considered geniuses?

Yes. Both Leopold and Loeb and William James Sidis are universally regarded as among history's greatest intellects.

Full Profile: Leopold and LoebFull Profile: William James Sidis

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