I'm not aware of a Taylor Swift song called "The Smallest Man Who Ever Lived". Taylor Swift has released many popular songs and albums over the years, but I couldn't find any information on this specific title.

However, there is a song called "The Smallest Show on Earth" that was written by Rodgers and Hammerstein for the 1957 musical State Fair. It's possible that you may be thinking of this song instead?

Additionally, the URL you provided appears to be a YouTube link to a video, but it's not showing up in my search results. Could you please provide more context or information about the song? I'll do my best to help you identify what it might be!