Here is the answer provided by Steve Maley on Quora. The response is in italics with my bolds and images.
Global Warming began in Muncie, Indiana on June 17, 1953 at 2:30 in the afternoon. It was a Tuesday.
Up until that time, weather was “average” all the time.
That is, except for the Dust Bowl, the Little Ice Age, Medieval Warm Period, etc.
Up until then, people had ideal, sustainable lifestyles. 90% of men spent all day in the fields looking at the backsides of two mules. Their spare time was spent chopping wood in hopes they could make it through another winter.
Women stayed at home and had babies. They had to have 8–10 because 2 or 3 of them wouldn’t live to see their 10th birthday.
Farm to Table was a thing. Since nobody had any money, it was a choice between raising your own food or starving.
Yes, it was an idyllic lifestyle. Damn fossil fuels screwed it all up.
How? By changing the atmosphere. Gases other than CO2 used to be 99.97% of the air we breathe. Now it’s 99.96%.
The horror.
Science Matters 
Reblogged this on Climate- Science.
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Check out sea level trend. It is the same as it was in 1850. See the chart here: https://tidesandcurrents.noaa.gov/sltrends/sltrends_station.shtml?id=8518750
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Thanks for commenting Frank, though sea level is not an issue in Indiana. But much fuss is made about warming and sea levels, all because of models. For example, here is the NYC tidal gauge compared to model projections:
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Reblogged this on Climate Collections.
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Good find and great article
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I figure it is earlier, when the Last Glacial Period reached its ‘tipping point’ >17,000 ybp. At the time, it was a ~3000m layer of ice and snow where I live in Scandinavia. Today, there are only a small fraction left in the nothern part.
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Fair enough Sasja. Here in Canada, on that timescale:
Following the retreat of the Wisconsin Ice Sheet about 7600–7300 years B.P. on the east coast of Hudson Bay (Hillaire–Marcel 1976; Allard and Seguin 1985) and about 7500– 7000 years B.P. in Ungava (Gray et al. 1980; Allard et al. 1989), the sea flooded a large band of coastline in Nunavik
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