Am I tripping or is this a terrible graph? I don't mean politically I mean mathematically. With a graph like that, the intersection is 0, the origin. The line should be contained in the top right quadrant. It's like the only graphs they know are the political compass graph and the ones from high-school algebra. If this were meant to be like a political compass graph, you don't draw lines between the points. The line represents a continuity rather than discrete points. If you place Hitler and Ghandi on a political compass, you wouldn't draw a line between them. Same thing here.

So fix the axis, there is no negative justness or effectiveness. Then don't draw a line between the points that are separate things.

I think what this person really wanted to do was show that as protests grow from terrorism to non-violent protests. But you need axis that compare the nonviolence to effectiveness. Then nonviolence to justness. Then justness to effectiveness. But you would need to throw in a third or fourth dimension to show all that as one. This single graph doesn't convey what the author intends. It's just someone who wanted to draw a graph to make it seem scientific.