The 100K Year cycle is at the point of repeat.
While the CO2 level is important for the benefit of plants, usually the focus is on this and not on the underlying temperatures. CO2 doesn't create heat, but it does retain heat (for roughly 300 milliseconds). As long as it is heated, CO2 will slow the dissipation. We have been fortunate to live in this period. During pre-industrial Europe, fifty percent of the population died because of climate-related causes. This is what happens when it is too cold. If the melting ice sheets cause the ocean to rise, to put it bluntly ... don't build your house on sand. There is a big difference between a flood or hurricane which has an immediate impact vs a freezing spell which lasts for decades or centuries. People can be evacuated or measures can be made to reduce the impact of a disaster but year after year where crops do not grow because of freezing temperatures. In the 1815 Tambora eruption the dust caused a temporary drop in the Earth's average land temperature of about 1 °C.
Europe, still recuperating from the Napoleonic Wars, suffered from food shortages. Food riots broke out in the United Kingdom and France, and grain warehouses were looted. The violence was worst in landlocked Switzerland, where famine caused the government to declare a national emergency. Huge storms and abnormal rainfall with flooding of Europe's major rivers (including the Rhine) are attributed to the event, as is the August frost. A major typhus epidemic occurred in Ireland between 1816 and 1819, precipitated by the famine caused by the Year Without a Summer. An estimated 100,000 Irish perished during this period. A BBC documentary, using figures compiled in Switzerland, estimated that the fatality rates in 1816 were twice that of average years, giving an approximate European fatality total of 200,000 deaths.
Source
The Year without Summer occurred at the end of the Little Ice Age. From there we have been in what has been called the Modern Maximum which might be also called the Modern Warm Period. The suggestion is that we might now be entering the Modern Minimum or within the next couple of solar cycles. If this is so, we might call this period the Modern Little Ice Age.
What might be worse though is that we might be seeing the maximum of the grand solar cycle ... which occurs roughly every 100K years. This could lead to a precipitous drop in global temperatures (in geologic time). This doesn't mean we will see the majority of North America buried under miles of snow in the next couple of days. We can expect that in about 80k years. What we could anticipate would be people reminiscing about the good old days when we had the effects of global warming.