This is not a new idea - slave ships were already doing it in the 18th Century. http://www.fastcodesign.com/1670325/infographic-the-slave-ship-chart-that-kindl

This is not a new idea - slave ships were already doing it in the 18th Century. http://www.fastcodesign.com/1670325/infographic-the-slave-ship-chart-that-kindled-the-abolitionist-movement http://www.fastcodesign.com/1670325/infographic-the-slave-sh...