A good sketch is better than a long speech.
The idea behind the good old proverb about the picture being worth more than a thousand words might be way older than the actual idiom or Napoleon’s quote.
The world has become highly dynamic and connected. This turns the communication of complex topics and interdependencies into a real challenge. Times that brought us (in my eyes terrifying) terms like „alternative facts“ make it more important than ever to convey information in a form that enables and catalyzes reflection, discussion and eventually change.
Data visualization can help us to see concepts and facts in a graspable and interesting way, be it about climate change or refugee migrations across the Mediterrenean Sea. Apart from this "educational" function, visualization are often just fascinating as well as beautiful and moving.
I will frequently blog about this topic and can, for instance, highly recommend David McCandless site called Information is beautiful.