In the 1640s, England was able to take New Amsterdam away from the Dutch without firing a shot since there was no Dutch army or navy left in the New World to defend it. Some small remnants of New Amsterdam still survive. I sometimes wonder what the United States might be like today if it hadn't been for tulip mania. Erwtensoep is a popular Dutch thick pea soup. It has cubes of pig fat, slices of blood sausage, and cracked pig's knuckles in it.
Investment bubbles result from mass mania psychology.
This is a form of mob or herd psychology. Everybody else is doing it. It is the belief that the safest place to be is in the middle of the herd. The fear of being left out. People fear being ridiculed or looking foolish for passing up their one great opportunity in life to get rich quick.