Since 11,600 BP and the end of the younger dryas period, the earth’s climate appears to have been considerably more stable than before. The records of earth temperature derived from proxies such as the Greenland ice sheet shows the climate before this time to have regularly decreased and increased in temperature very suddenly, by many degrees. There is no consensus as to why and how this happened. Scientists speculate it must be because of some combination of changes to ocean circulation, air current movements or solar insolation.
There must be a reason why the climate has become more stable.
If I am right that earth crust displacement happens, this may be the causes of the current stability.
Given the positions of the continents of the earth over the last million years, if the poles shift say 45 degrees of lattitude the polar regions would be occupied by varying amounts of land and sea. Land in polar regions accumulates great thickness of ice sheet, sea does not as the ice will float when sufficiently far from land for ice shelfs to not be able to form.
The earth is currently in a uniquely stable position from this point of view. The Antarctic ice sheet is all on land and centred on the pole, not imbalanced with half on land and half on sea. Similarly in the Arctic where the ice cover is all on sea, and similarly not imbalanced.
Are we particularly fortunate that the unpredictable swinging of earth crust displacement driven by ice accumulation has for the first time landed us in a uniquely stable configuration such that the driver of earth crust displacement is no more?