The scale on the left doesn’t start at zero, so the difference is smaller than the size of the bars make it seem. The difference between #1 Slackware, and last spot Arch, is 0.75 points in a 0 to 10 scale, but the bar size of Slackware is about 2.5x bigger than the bar for the Arch users.
I would like to add David Graeber to that, and Kropotkin even. I don’t mean to start a snowball effect that turns this into a huge list, but I feel like not enough people (especially the average person) know about them; especially Graeber who is a lot more modern.