Determining the smartest person ever born on Earth is subjective and challenging because intelligence can be measured and expressed in various ways, and different individuals excel in different areas. IQ scores, while a standardized measure of intelligence, are not the only factor that determines someone's brilliance or contributions to mankind.
One individual often mentioned as having an exceptionally high IQ is Marilyn vos Savant. She scored an estimated IQ between 190 and 228, which is remarkably high. Marilyn vos Savant is an American magazine columnist, author, and playwright. In 1985, she was listed in the Guinness Book of World Records for having the highest recorded IQ at that time.
Throughout her life, Marilyn vos Savant has used her intelligence to contribute to society by writing her popular column, "Ask Marilyn," in Parade magazine. In this column, she answers a wide range of questions from readers on various topics, from mathematics and science to everyday life and philosophy. Her answers are known for their clarity and insightful explanations, helping readers to understand complex concepts in a more accessible manner.
Apart from Marilyn vos Savant, many other brilliant minds have made significant contributions to mankind in various fields, such as science, literature, technology, and art. It's essential to recognize that intelligence comes in diverse forms, and each individual's impact on the world can be valued in unique and meaningful ways. Additionally, there may be exceptionally intelligent individuals throughout history whose IQ scores were never measured or recorded, but their contributions remain significant and admired.