On Tuesday, January 16, 2018 at 11:03:59 PM UTC, Gerald Kelleher wrote:
There is therefore no such thing as 'climate change' unless inclination increases or decreases

While this statement is wrong as written, it is true that the inclination of the Earth changes and this does indeed affect climate. Look up Milankovitch cycles:

The angle of the Earth's axial tilt with respect to the orbital plane (the obliquity of the ecliptic) varies between 22.1° and 24.5°, over a cycle of about 41,000 years. The current tilt is 23.44°, roughly halfway between its extreme values. The tilt last reached its maximum in 8,700 BCE. It is now in the decreasing phase of its cycle, and will reach its minimum around the year 11,800 CE.