Dansgaard-Oeschger cycles have been researched and shown to occur in 1500 year cycles, taking the form of rapid warming episodes, typically in a matter of decades, each followed by gradual cooling over a longer period.
Planetary warming cycles have been observed on Mars (where ice caps are also melting), Jupiter, Pluto, and Neptune's moon Titan--though, causation and/or correlation to Earth's cycles is not being implied, but interesting nonetheless.
There has been an unexplained pause in global warming: Between 1979 — when weather satellites started measuring temperatures in the lower troposphere — and 1997, they rose about 1.1 degrees Celsius (1.98 degrees Fahrenheit).
Temperatures stopped rising then, have fallen since 2012. The “pause” in warming (212 months) is now longer than the warming trend was (211 months).
Carbon released in out atmosphere by mankind may have an accelerating effect, but I don't think it is the main culprit.
That's is not to say that we shouldn't continue to progress past fossil fuels-- a finite resource responsible for some of the major conflicts on our planet--but, we need to be very careful who we give the authority to regulate such matters and I don't believe it should be a international body of any sort. We should keep our regulation as decentralized as possible.