We are a commune of inquiring, skeptical, politically centrist, capitalist, anglophile, traditionalist New England Yankee humans, humanoids, and animals with many interests beyond and above politics. Each of us has had a high-school education (or GED), but all had ADD so didn't pay attention very well, especially the dogs. Each one of us does "try my best to be just like I am," and none of us enjoys working for others, including for Maggie, from whom we receive neither a nickel nor a dime. Freedom from nags, cranks, government, do-gooders, control-freaks and idiots is all that we ask for.
Looks to me like a sine wave with an amplitude fluctuation thrown in. Also looks as though trend is that the glacial periods are getting longer and more intense, and the interglacial periods are getting shorter. What the (relatively) near term CO2 picture will wind up looking like over the run of the current interglacial, is anybody's guess, but it looks to me as though we are nearing the halfway point of the current interglacial and thus, should be nearly peaking on CO2.
Of course, I'm not any climate scientist, but that chart does look seem to indicate that the earth is going through a long-term cooling, rather than warming.