Extraordinary Popular Delusions and The Madness of Crowds

Outline

Extraordinary Popular Delusions and The Madness of Crowds (1841) is a classic study of how whole societies can be swept up in collective excitement and poor judgement. Charles Mackay describes famous financial bubbles, such as the Dutch tulip mania and the South Sea Bubble, along with fads and popular fears of his time. The book remains a timeless lesson in crowd psychology and the dangers of following the herd.

• Whole societies can be swept up in collective excitement, and good judgement often suffers when many people believe the same thing at once.
• Fear, imitation and shared belief are the forces that push crowds toward financial mania, superstition and irrational behaviour.
• The Dutch tulip mania and the South Sea Bubble show how a financial bubble can grow out of crowd enthusiasm.
• Mackay also describes the fads and popular fears of his own time, showing that collective folly is not limited to money.
• Written in 1841, the book still teaches the dangers of following the herd and remains a lesson in crowd psychology.

Charles Mackay (1814–1889) was a Scottish journalist, poet, and author. He worked as an editor for several British newspapers and wrote songs and poems that were popular in his day. He is best remembered for Extraordinary Popular Delusions and The Madness of Crowds, which is still widely read by investors and students of human behaviour.