And if you're going to say, "I'm going to stop talking about selective pressures," you can take "The Origin of Species" and throw it out of the window, for it's about nothing else but selective pressures.
Hvis man vil sige: "Jeg vil nu holde op med at tale om selektivt tryk" så kan man tage "Arternes Oprindelse"  og smide den ud af vinduet, for den drejer sig kun om selektivt tryk.