The social reformer recognized for establishing the first public schools in the U.S. is Horace Mann. Often called the "father of the American public school system," Mann advocated for universal, non-sectarian, and free education for all children. Born in 1796, he championed the idea that education is vital for a democratic society, emphasizing the importance of trained teachers and standardized curricula. Mann's efforts laid the groundwork for the modern education system and inspired further reforms. His legacy remains significant in discussions about educational equity and access in contemporary society.