In year 1500, there were about 500 million Homo Sapiens in the entire world. Today, there are 7 billion. The total value of goods and services produc… - Yuval Noah Harari
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In year 1500, there were about 500 million Homo Sapiens in the entire world. Today, there are 7 billion. The total value of goods and services produced by humankind in the year 1500 is estimated at $250 billion, in today's dollars. Nowadays the value of a year of human production is close to $60 trillion. In 1500 humanity consumed about 13 trillion calories of energy per day. Today, we consume 1,500 trillion calories a day. (Take a second look at those figures — human population has increased fourteen-fold, production 240-fold, and energy consumption 115-fold.)
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About
Yuval Noah Harari
Yuval Noah Harari (Hebrew: יובל נח הררי; born 24 February 1976) is an Israeli professor of history at the Hebrew University of Jerusalem and the author of Sapiens: A Brief History of Humankind.
Christians and Muslims who could not agree on religious beliefs could nevertheless agree on a monetary belief, because whereas religion asks us to believe in something, money asks us to believe that other people believe in something.
Were the Australian extinction an isolated event, we could grant humans the benefit of the doubt. But the historical record makes Homo sapiens look like an ecological serial killer.
The greatest scientific discovery was the discovery of ignorance. Once humans realised how little they knew about the world, they suddenly had a very good reason to seek new knowledge, which opened up the scientific road to progress.
