Left-handed people are NOT more intelligent than right-handed! The idea that left-handed people are generally more intelligent than right-handed was based on the examples of famous left-handed people like Leonardo da Vinci, Michelangelo, Beethoven, Benjamin Franklin, Isaac Newton… The study of University of Adelaide was conducted on more than 5,000 people. Experts have tracked the school’s success and impression of students about their abilities and found that the left-handed are on average the same or even less successful in the school than the right-handed.