Just had to share a great video I was passed by a friend in the intel biz. It summarizes the give and take of sovereignty in the major alliances over the past three years. Some of the smaller alliance names are too digitized to read but you'll get an overall impression. Watch for Goonswarm's later instantaneous switch to IT alliance towards the end.
As it does not properly fit in this column and the fullscreen button may not be visible on your screens, I suggest you double-click the video box to fullscreen it then play.