The influential figure known for promoting public education in America is Horace Mann, often regarded as the "Father of American Education." In the 19th century, Mann advocated for universal, non-sectarian public schooling and believed education was a fundamental right for all children, essential for a democratic society. He pushed for reforms that included standardizing curricula and training teachers, emphasizing the importance of moral and civic education. His efforts significantly shaped the American education system, laying the groundwork for the establishment of public school systems across the United States.