Author: Andreas Graefe.

This work was funded by the Tow Foundation and the John S. and James L. Knight Foundation. Thanks to interviewees Saim Alkan, Reginald Chua, Lou Ferrara, Tom Kent, and James Kotecki. Thanks also to Peter Brown, Arjen van Dalen, Nick Diakopoulos, Konstantin Dörr, Mario Haim, Noam Lemelshtrich Latar, and Claire Wardle for providing comments and suggestions. January 2016