There are some dots in the upper-left quadrant, and then a bunch of dots bouncing along the bottom tenth of the graph. It isn’t very informative, and breaking it out by topic doesn’t help a lot.
In this case, cutting down the to the last seventy-five years produces a much more readable graph.
There are too many overlapping dots here to see much, but the animation is a little clearer.
And the result is an animated version of some graphs that appeared a lot in the previous chapter.