Visit this climate history temperature chart page and then scroll down that page to witness how temperatures have changed from millions of years ago to those more current.
The above linked page represents a visual presentation of a wide selection of peer reviewed studies. These charts make it abundantly clear that researchers have conclusively found that our modern temperatures are not so "unprecedented" nor so unusual.
Likewise, it is obvious that this actual climate history (sans models) proves that the global climate is highly variable and makes abrupt changes, without any human CO2 emissions.
This plethora of empirical evidence represents years of scholarship and should be a constant reminder to policymakers of one for sure certainty: that our current climate and temperatures will change, and there is nothing we can do to change or stop that highly complex and gargantuan natural process.
(source of above image)