The human species, unlike other animals, does not learn from its mistakes. History demonstrates how we keep repeating the same follies with enormous cost, usually to the young of the species most particularly. Sadly, very few politicians achieve university degrees in History, preferring to study the fantasy subjects within the PP&E curriculum.
The AAV blog has turned up this gem from no less than Ernest Hemingway whom I think nails the problem with politics, government and international behaviour:
Hemingway wrote this in 1935 in an essay called "Notes on the next war" in which he predicted the beginning of the Second World War in Europe.
The pattern seems to be repeating in the 21st Century: Severe economic mismanagement and stagnation followed by the rise of extremist demagogues. The difference this time is that the demagogues are rising in Britain and America, not Germany and Italy.
Tom