Correspondence:
Patricia A. Soranno, Michigan State University; Email:soranno@msu.edu
Authorship statement: B.R.D. and S.H. wrote the first draft of the manuscript and all authors contributed substantially to revisions. P.A.S. conceived of the essay.
Data statement: No data were used to write this article.
Number of words: 1,974
Number of figures/tables/boxes: 2 (figures)