Climate changes. Always has.

I've been called several times now a "climate change denier," and I'm not alone in being tarred with that brush. It's a common insult used by warmists, most of whom will otherwise evince some opposition to so called "hate speech," except that is when used by themselves or by fellow travellers.

As you're no doubt aware, the change of phrase from "global warming" to "climate change" betrays the loss of confidence in the mantra evinced by warmists since the failure of the climate to warm past its 1998 El Nino high. It's also intended to evoke the holocaust by equating non-warmists with Nazi apologists such as David Irving and his ramshackle brood of holocaust deniers (scum so soundly exposed in Deborah Lipstadt's fine book which almost single-handedly brought the deniers down).

Quite aside from the disgraceful affront to dignity and to the six million victims of genocide that warmists are happy to cheapen simply to make a rhetorical point, the idea that I or any other non-warmist denies that climate changes is just not true. No one, least of all me, denies that climate changes. Climate has always been changing. It's been changing for all of the 4,550 million years since the planet condensed from recycled stardust.

The irony to me is that its warmists who like to deny the evident fact of those 4,550 million years of change in which continents were pulled apart and stitched back together; 4,550 million years in which volcanoes and glaciers played tug of war with the earth's climate while sea levels, carbon dioxide levels, temperature levels and life on earth rose and fell and rose and fell to heights and depths much greater and much more extreme than anything seen in the last hundred years of relative stability. But warmists like to ignore all that history of change and to reify instead the last few decades as if they're climatically unique.

These are people who need to get out more.

Climate changes. That's what earth's climate does, and always has done. It's time warmists themselves began recognising that fact and learning some climate history instead of wringing their hands in global warming dismay every time a one-in-hundred-and fifty storm event happens in their neighbourhood. In his climatic history of the world, University of Melbourne professor of geology Ian Plimer takes you on that 4,550 million-year journey of the planet's history. It's the entire history of the world in just four pages, including pictures. Print it out and read it over lunch: The Past is the Key to the Present: Greenhouse and Icehouse over Time - Ian Plimer.

It's so succinct you'll still have time left over to discuss it over coffee.