Vitamintalent has posted the ad agency bloodline, with the awesome large view available here and I suspect it'll hang on many cubicle-walls soon.
As helper monkeys, we're quite curious. And as a talented, creative individual (who clearly knows where to find great info), we thought you might be curious, too. So we created this infographic (check out the full graphic) to give a look at the mergers, acquisitions, and launches of some of the largest agencies in the world, from the early 1800s to today.
It's spiffy.