Yet all the warm periods in mankind's history is when culture has flourished. The cold periods in mankind's history have been when culture has regressed and humans have suffered greatly.
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Yet all the warm periods in mankind's history is when culture has flourished. The cold periods in mankind's history have been when culture has regressed and humans have suffered greatly.
Are you referring to the warmer and cooler periods that occurred regionally during the Holocene, or to the whole of H. sapiens' cultural history?
For instance compare the medieval warm period with the mini ice age.
Warmer Days and Longer Lives
http://www-leland.stanford.edu/~moore/history_health.html
"From around 800 A.D. to 1200 or 1300, the globe warmed again considerably and civilization prospered. This warm era displays, although less distinctly, many of the same characteristics as the earlier period of clement weather. Virtually all of northern Europe, the British Isles, Scandinavia, Greenland, and Iceland were considerably warmer than at present. The Mediterranean, the Near East, and North Africa, including the Sahara, received more rainfall than they do today. During this period of the High Middle Ages, most of North America also enjoyed better weather. In the early centuries of the epoch, China experienced higher temperatures and a more clement climate. From Western Europe to China, East Asia, India, and the Americas, mankind flourished as never before.
This prosperous period collapsed at the end of the thirteenth century with the advent of the "Mini Ice Age" which, at its most frigid, produced temperatures in central England for January about 4.5deg.F colder than today. Although the climate fluctuated, periods of cold damp weather lasted until the early part of the nineteenth century. During the chilliest decades, 5 to 15 percent less rain fell in Europe than does normally today; but, due to less evaporation because of the low temperatures, swampy conditions were more prevalent. As a result, in the fourteenth century the population explosion came to an abrupt halt; economic activity slowed; lives shortened as disease spread and diets deteriorated."
Warmer Days and Longer Lives
http://www-leland.stanford.edu/~moore/history_health.html
"From around 800 A.D. to 1200 or 1300, the globe warmed again considerably and civilization prospered. This warm era displays, although less distinctly, many of the same characteristics as the earlier period of clement weather. Virtually all of northern Europe, the British Isles, Scandinavia, Greenland, and Iceland were considerably warmer than at present. The Mediterranean, the Near East, and North Africa, including the Sahara, received more rainfall than they do today. During this period of the High Middle Ages, most of North America also enjoyed better weather. In the early centuries of the epoch, China experienced higher temperatures and a more clement climate. From Western Europe to China, East Asia, India, and the Americas, mankind flourished as never before.
This prosperous period collapsed at the end of the thirteenth century with the advent of the "Mini Ice Age" which, at its most frigid, produced temperatures in central England for January about 4.5deg.F colder than today. Although the climate fluctuated, periods of cold damp weather lasted until the early part of the nineteenth century. During the chilliest decades, 5 to 15 percent less rain fell in Europe than does normally today; but, due to less evaporation because of the low temperatures, swampy conditions were more prevalent. As a result, in the fourteenth century the population explosion came to an abrupt halt; economic activity slowed; lives shortened as disease spread and diets deteriorated."
Why don't we use a graph that uses no temperature adjustments for recent years.
Post it.
I have posted HadCRUT4 temperature data multiple times in the past. The unadjusted HadCRUT4 temperature data does not show any type of "hockey stick". The hockey stick temperature data adjustments were added by Mann and others. Effectively charts showing a "hockey stick" rapid rise in recent years (using adjusted data) cannot not be reliably compared to temperatures for any previous time frame.
https://www.uh.edu/nsm/earth-atmosp...vidence-of-significant-warming_april-2020.pdf
HadCRUT4 temperature data can be downloaded from the British Met
https://www.metoffice.gov.uk/hadobs/hadcrut4/data/current/series_format.html
https://www.uh.edu/nsm/earth-atmosp...vidence-of-significant-warming_april-2020.pdf
HadCRUT4 temperature data can be downloaded from the British Met
https://www.metoffice.gov.uk/hadobs/hadcrut4/data/current/series_format.html
That's a graph of anomalies.
Plot your own graphs from the source data. I gave you the url to download it.
That chart is fine, for what it shows.