There has been much debate about moral consideration, that is, what entities are to be considered as worthy of moral consideration. Perhaps the most famous, and relevant to hunting, are the animal welfare ethics of Tom Regan and Peter Singer. Regan, a rights theorist, and Singer, a utilitarian, argue that animals deserve moral consideration, because they are sentient. Others, such as Albert Schweitzer, have gone further, arguing that we ought to have a "reverence for life", thereby including plants, and presumably fungi, microbes, etc. Still others, such as Aldo Leopold, have argued that soils, waters, and all members of the biotic community ought to be considered. The task seems to have been one of increasing one's moral community. That is, increasing the scope of what one considers to be morally relevant. In A Sand County Almanac, Leopold remarks on this phenomenon: "The first ethics dealt with the relation between individuals…Later accretions dealt with the rel