Take the 2-minute tour ×  In evolutionary game theory, it is
typical to model organisms as having a base fitness that is
modified slightly by the game interaction. The ratio of the game
effect versus the base fitness determines the strength of
selection, with weak selection meaning the game modifies overall
fitness only slightly, and strong selection meaning that the
game payoff is a big part of the overall fitness of the
organism.  Most analytic models like to assume weak selection
because it allows the authors to Taylor expand the selection
function and linearize it by dropping terms that are higher
order in the stength of selection. However, it is unclear that
results derived for weak selection would necessarily hold under
strong selection. Are there mathematical (or computational)
models where weak and strong selection produce qualitatively
different results? If not, is there an argument as to why weak
and strong selection should produce the same results?  I've also
seen this discussion come up outside of