The bad boy of bar charts: William Playfair (2023)
A spy, a scoundrel, and a scholar William Playfair was all three. He led an extraordinary life at the heart of many of the great events of the 18th and 19th centuries, mostly in morally dubious roles. Among all the intrigue, scandal, and indebtedness, he found time to invent the bar and pie charts, and make pioneering use of line charts. As we'll see, he was quite a character. Playfair the scoundrel Playfair's lifetime (1759-1823) contained some momentous events: The development of the steam