One can see, in historical record, it expanding from the village, to the clan, to the tribe, to the nation, to other races, to both sexes, and, in Singer's own arguments, something that we should extend to other sentient species.
U povijesnim zapisima je vidljivo njegovo širenje od sela na klan, pa na pleme, na naciju, na druge rase, na oba spola, a prema Singeru trebali bi ga proširiti i na druge svjesne vrste.