I thank P. Jeffrey Brantingham, Robert Boyd, Peter J. Richerson, Sarah Mathew, and the anonymous reviewers for their useful comments and criticisms on the various versions of the paper.
http://plosone.org/article/info:doi/10.1371/journal.pone.0045150#article1.back1.ack1.p1

The following names should have been listed in the acknowledgements:
Douglas H. Erwin
Philip D. Gingerich
Andrew Hendry
Michael T. Kinnison
David B. Madsen
Jerry A. Sabloff