The concept of climate is a human, mathematical construct, of an 'average of weather events' over a variable number of years.
The historical record shows that climate has always been changing, both locally and globally, in big cycles and in little cycles, over long periods of time, and over short periods of time, so there's no rational reason to suppose that this natural process has suddenly stopped and that all current changes in climate are due to mankind's influence.
If it turns out to be true that the current, elevated levels of CO2, are the main driving force behind the current, slight global warming, which I doubt, then such elevated levels could protect mankind from the uncomfortable effects of another Little Ice Age in the near future, which could result from natural processes without the balancing effect of elevated levels of CO2.
I can't help wondering if I'll live long enough to see this happen, and read reports of how and why our fathers got this issue so wrong.