Came across this when I searched on Tragedy of the Commons for the drought thread.
https://sketchplanations.com/
In 2013-14, Jono Hey did a "sketchplanation" (sketch that explains something) every day for a year. Since then he has done one per week. So that comes to about 700.
I just spent a few minutes there. I like the way s/he uses a very simple example to make it easy to understand the concept.