But if Christmas is a time for looking back and counting our blessings, the beginning of a new year is a time for looking forward, which brings our thoughts inevitably to Armageddon. In a bracingly realistic series called The End of the World, podcaster Josh Clark lists the numerous ways in which this could happen: artificial intelligence, biotechnology experiments gone wrong, accidental release of manmade pathogens, particle physics experiments gone wrong, the greenhouse effect and natural catastrophes (supernovae, asteroid collisions).
You'll notice that with the exception of natural catastrophes, these are all the products of human activity. Surviving them, therefore, is also our responsibility, and will depend on us acting in our own best interests.
Which isn't looking too likely at the moment.
I base that assumption on that fact that, although the total number of planets we have on which to live is one, many people think banning single-use plastic bags will ensure its survival.
Here's a statistic to put that in perspective - percentage of greenhouse gas emissions attributable to the Chinese coal industry between 1988 and 2015: 14.32 per cent; percentage attributable to plastic-bag production: way less.
Until those 100 companies that, according to 2017's Carbon Majors Report, cause 71 per cent of greenhouse gas emissions are brought into line, no number of kitchen benchtop compost buckets or reusable straws can make a difference. Yet people keep making compost buckets and China keeps burning coal.
The number one threat to humanity's continued existence is human beings - in all our gobsmacking stupidity. Hopefully people will become increasingly educated on these issues and agitate for change where it counts – in corporate boardrooms, not on kitchen benches.
This isn't a good week to get yourself educated though - looking up some basic stuff for this column, I was told by the United States Geological Survey website that "due to a lapse in appropriations, the majority of USGS websites may not be up to date and may not reflect current conditions". Never fear - once the money is found to build that wall, the USGS will be able to get back online and people will be able to get information in which our survival may depend.
In the meantime, it's not looking good for too many happy new years to come.