Making a statement in words is the traditional way to communicate. But cartoon drawings can be effective because if the message is thought-provoking, as in the novel Maus by Art Spiegelman, complex ideas are more easily conveyed, in my opinion. See for example a brief story of the Dawn of Man.
![From the Wait But Why blog.](http://goldridge.us/wp-content/uploads/2016/04/The-Dawn-of-Man-cartoon.jpg)