Potter Stewart was an Associate Justice of the United States Supreme Court, serving from 1958 to 1981. Appointed by President Dwight D. Eisenhower, he was known for his moderate views and played a significant role in important cases related to civil rights, free speech, and privacy. Stewart is perhaps best remembered for his opinion in the landmark case Jacobellis v. Ohio, where he famously stated he could not define obscenity but knew it when he saw it. His judicial philosophy emphasized the importance of individual rights and the need for a balanced approach to constitutional interpretation.