"there is no single way to be rational"

"For an individual, choosing the strategy most likely to succeed maximises expected winnings. But a group made up of such optimising individuals is eventually wiped out by infrequent calamities. As a result, the groups whose genes come to dominate are those who apply ‘mixed strategies’, varying their habitat. The American political scientist James Scott describes the reality of this in the history of ‘scientific’ forestry. Planting the ‘best’ trees led to monocultures which were in due course wiped out by previously unknown parasites. The Irish potato blight was able to devastate that country’s agriculture – leading to at least a million deaths from disease and starvation and to substantial and prolonged emigration from the island – because the potato had been identified as the optimal crop for that country’s conditions and so the country’s food production was poorly diversified. Humans are all better off because we are all different, and because there is no single way to be rational; we give thanks for our current state to St Francis and Oscar Wilde and Steve Jobs and to millions of people who became skilled at their own specialist but routine tasks.”

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Trechos retirados de “Radical Uncertainty” de John Kay e Mervyn King