Wow, I didn't realize how many left-leaning folk only apply humanist principles within speciesist moral parameters. Maybe I'm quite a bit more radical in perspective than my PM score suggests.
Humanist principles are, quite obviously, for humans.
I used the term humanist instead of personist since the latter is not one most people are familiar with. It is tolerable if folks prefer to apply its prescriptions only to human beings but I figure such a stance is anti-egalitarian in its implication that a human in-group should dominate and also exploit subordinate animal out-groups irrespective of their interests and sophistication of mental faculties.Who said anything about not taking mental faculties into account? "Personism" would only apply to people. Obviously when most of us think about killing animals for food we're thinking about animals with lower intelligence than humans, or in other words beings we don't consider to be people. I imagine if cows started talking and holding intelligent conversations our answer in regards to cows would be different.