The mathematical theory of evolution is clear and powerful. Exact calculations of evolutionary dynamics (Antal et al.. 2009; Allen and Nowak. 2014; Fu et al.. 2014; Haven and Doebelt, 2004; Szabo and Kith. 2007; Antal and Scheming. 2006; Traulsen et al., 2008; van Veelen et al.. 2014; Simon ct al.. 2013)