Robert Green Ingersoll (1833-1899) was an influential American lawyer, speaker, and political leader. Known as the “great agnostic,” Ingersoll was a passionate advocate for social reform, secularism, and rationalism in the late 19th century. He gained national renown for his captivating speeches that challenged religious dogma and defended the principles of science and humanism. Ingersoll’s oratory skills made him a sought-after public speaker, addressing topics such as women’s rights, civil liberties, and the separation of church and state. Despite criticism and ostracism for his beliefs, Ingersoll’s passionate advocacy played a significant role in shaping public opinion, paving the way for greater acceptance of secularism and religious skepticism in American society.