Well, P.T. Barnum's life was full of events that inspired the movie. His rise from poverty to becoming a well - known showman is a big part. Also, his ability to attract diverse and extraordinary performers to his shows was real. He was a master at marketing and getting people interested in his circus. That's all reflected in the movie to some extent.
The real - life events include Barnum's early struggles in business and his determination to create something unique. His discovery and recruitment of people with different abilities and appearances for his circus was a major aspect. His relationship with his family also had an impact, although the movie might have tweaked it a bit for the story. His constant strive for more grand and exciting shows is another real - life element that made it into the movie.