Infectious Exuberance

America, from its inception, was a speculation,” begins the historian Aaron M. Sakolski’s 1932 classic, The Great American Land Bubble. George Washington himself was a land speculator, Sakolski notes, and by Washington’s time it was widely perceived that America would eventually be populated much more densely by vast numbers of immigrants, leading many investors to dream of rapidly rising land prices. Waves of speculative mania swept towns, cities, and regions from the 18th century onward, even along the vast and empty frontier. Up, up went the prices. And then, inevitably, down.

Read Robert J. Shiller's article in The Atlantic: "Financial bubbles are like epidemics— and we should treat them both the same way."