Alexander the Great

Most of the improvement in life expectancy in the last 10,000 years has taken place in the last 100 years.

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Johan Norberg describes the tremendous progress in the last several hundred years in so many areas: life expectancy, health, sanitation, liberty, education, and equality. He discusses these wonderfully delightful trends in his book Progress: 10 Reasons to Look Forward to the Future. I will highlight merely a few of the many things I found fascinating […]

Middle Ages

Gross World Product over last 27,000 years

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Gross World Product, according to Wikipedia is the combined gross national product of all the countries in the world. Because imports and exports balance exactly when considering the whole world, this also equals the total global gross domestic product (GDP). I got curious about the world-wide GDP after thinking about two previous posts: Growth in world population Increase of income per person over […]

Middle Ages

Growth in world population

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Our World in Data, the web site of Max Roser, visualizes data in amazing ways. Check out this graph of world population: “World Population over the last 12,000 years and UN projection until 2100” by Our World in Data is licensed under CC BY-SA 3.0.  The graphs which follow are derived from this information and […]

Middle Ages

Illustration of 16th century armament

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The Cabrillo National Monument in San Diego describes the expedition by Juan Rodriguez Cabrillo to explore the west coast of what is now the U.S.  He arrived in San Diego harbor in October 1542. In the museum, there are two models demonstrating replicas of 16th century arms. The crossbowman above is wearing a metal helmet […]

Middle Ages

Prices in late Middle Ages

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While browsing the ‘net looking for indicators of prices in the Viking Age, I came across a treasure trove of prices for the late Middle Ages. Range of age is from the middle 1300s to the  middle 1500s, with most of the prices in the 1300s, it seems. Items listed are clothing, work tools, food, […]