That's quite the non-sequitur. What relationship are you implying between this supposition and the scientific facts of climate change? Would your argument change if it were astronomers telling you an asteroid would hit in 5 years?

I was replying to > In a few decades, historians will be able to look back

Historians don't look back only a few decades. That's still politics. Sorry if that wasn't clear.

My mistake, I thought we were still discussing climate change, not dropping into definitional pedantry.

Since we're into definitional pedantry, you're incorrect anyway: https://en.wikipedia.org/wiki/Contemporary_history