Samuel Hahnemann was a German physician born on April 10, 1755. He is best known as the founder of homeopathy, a system of alternative medicine that he developed in the late 18th century. Hahnemann believed that diseases could be treated by substances that produce similar symptoms in healthy individuals, a principle known as "like cures like." Hahnemann published his ideas in the book Organon of Medicine in 1810, which laid the foundation for homeopathic practice. He emphasized the importance of individualized treatment and the use of highly diluted remedies. Hahnemann's work has influenced many practitioners and sparked ongoing debates about the efficacy of homeopathy.