P.T. Barnum (1810-1891) was an American showman, businessman, and entertainer. He is best known for founding the Barnum & Bailey Circus, which became the most successful traveling circus in the world. He was also a successful author, publisher, and philanthropist. Barnum was a master of self-promotion and was known for his outrageous stunts and hoaxes. He was a pioneer in the development of the modern entertainment industry, and his legacy continues to influence popular culture today. He was a passionate advocate for the rights of the working class and was a major supporter of the abolitionist movement. Barnum's life and career have been the subject of numerous books, films, and plays.