Well... On average the Earth’s climate has been cooling ever since the formation of the Himalayas. The pattern IS cyclical, as you state, but, our current interglacial is almost (almost) as warm as it’s been for the last few cycles. Therefor we ARE presently at a warm “extreme” (within the last million years or so), but it is a normal extreme / should be expected every 100k years or so. Only the relative lack of variation for the last 8k years or so is at all unusual, but, even so, two interglacial periods back, the shape of that peak (sort of clipped off) was somewhat similar to the one we are in.
That could be true except, they cant be certain.
The one thing is that our present climate is not the extended norm for the earths cycle climate. These warm periods generally last a short time-that is according to some climate experts..REAL experts and not the false prophets that grovel at the feet of their lords and masters in the political arena for funds to skim their wealth off from.
The Great Lakes, for example, were formed some 12 to 15 thousand years ago...or so. A less than a blink of the eye in time for such things.
But, and this is a big but, volcanism has a serious hand in climate changes. In abt 535 or so, there were one or two huge volcanic eruptions that changed the climate for years. Thankfully, these happened at a time where the cycles were in the warm and it did not throw the earth into another full born ice age.
BTW, ice ages (glacial) are dry periods and not wet. We can survive and prosper in warm climates. A glacial period? No. A glacial period started right now and it could be nearly a global extinction event.