>>2853480>and it pretty clearly has fuck-all to do with peopleCorrect.
Warm and cold periods:
Literal plant and tree seeds under the center of the Greenland ice sheet, implying complete melting of the sheet at some point within the last 1 million years.
Interglacial periods, last major 10,000+ year long one was c120k years ago.
Younger dryas catastrophes. Zero human input.
Holocene climatic optimum. Zero human input. Warmer than today.
Neolithic warm period. Zero human input. Warmer than today.
Bronze age warm period. Warmer than today. Zero human input.
Bronze age collapses cold period. Zero human input.
Roman/Chinese/North American Indians warm period. As warm as today, zero human input.
Dark ages/migration age cold period. Zero human input, extremely massive continental human migrations occurred. Within this period a severe cold snap occured c536 AD, lakes in central and southern Europe froze over in summer.
Viking/North American Indian warm period. As warm as today, in fact the tree line was about 100m higher than today in China, Scandinavia and North America. Zero human input.
Little ice age. 400 year slight cold period, consistent slight building of temperate glaciers. norse abandonment of Greenland and almost Iceland. Pueblan people abandonment of all settlements in the USA southwest. Massive migration of Dene-Yenniseian speakers into the SW USA from further north and east due to severe cold. Glaciers swallowed villages in the alps and Scandinavia. Grapes could no longer be grown in Germany, England and Northern France. Temperature recording only started at the end of this period. Zero human input.
Modern warm period, c1750 to today. Grapes can be grown in England, Germany and northern France again. Glaciers retreated. Modern recording technologies were only invented at the start of this period, partial modern sunspot records only start c1500 AD. Tree line is still 100m lower than the Viking warm period. Carbon is a symptom, not a cause.