Does dark matter matter?

With the world growing darker (politically and in season), fires burning, waters flooding... I ought to look for something light to read, but I end up haunted by dark matter and enjoying the sense that perhaps we can learn, if not directly from the past then possibly from its fictional recreation. So here I am enjoying Alice in Sinland, Killing the Devil, following Stainer through a collegetown summer of drugs, watching Ruined Wings try to fly, Missing Presumed and Accountable to None. Dark m...