Wikipedia is dominated by male editors by Nathan Yau.
From the post:
After he saw a New York Times article on the gender gap among Wikipedia contributors (The contributor base is only 13 percent women), Santiago Ortiz plotted articles by number of men versus number of women who edited. It’s interactive, so you can mouse over dots to see what article each represents, and you can zoom in for closer look in the bottom left.
This graphic merits wide circulation.
There isn’t a recipe for how to make such an effective graphic, other than perhaps to have studied equally effective graphics.
I will try to hunt down an example I saw many years ago that plotted population versus representation at the United Nations. If I can find it, you can draw your own conclusions about it.
In the mean time, if you spot graphics/visualizations that are clearly a cut above others, please share.